{"title":"Dinan","description":"\u003cp\u003eShop the full Dinan lineup at Straight Six Imports — performance springs, suspension handling kits, engine software, exhaust systems, and BMW-specific performance upgrades engineered to transform your BMW's handling, power, and driving dynamics without compromising reliability or daily-driver usability.\u003c\/p\u003e\u003cp\u003eDinan is the most respected BMW performance tuning brand in North America — an American company with decades of BMW-specific engineering experience and a product lineup developed specifically for BMW's suspension geometry, engine management systems, and electronic architecture. Dinan products are engineered to work with the factory BMW electronics rather than against them — delivering measurable performance improvements with the reliability and refinement that BMW owners expect.\u003c\/p\u003e\u003ch4\u003eDinan Product Highlights:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Spring Sets\u003c\/strong\u003e — CNC-wound chrome silicon lowering springs with 30% increased spring stiffness, reduced body roll, and improved suspension geometry — compatible with factory electronic (EDC) shocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplemental Ride Quality \u0026amp; Handling Kits\u003c\/strong\u003e — progressive-rate bump stops tuned specifically for Dinan springs — maximizes suspension travel, prevents bottoming out, and amplifies mechanical grip when paired with Dinan spring sets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Software \u0026amp; Engine Upgrades\u003c\/strong\u003e — Dinan-engineered BMW performance upgrades across engine, exhaust, braking, and chassis systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDinan strongly recommends pairing Performance Spring Sets with the corresponding Supplemental Ride Quality \u0026amp; Handling Kit for correct ride height, ride quality, and handling performance. Browse the full Dinan lineup below and contact Straight Six Imports for fitment guidance on your specific BMW.\u003c\/p\u003e","products":[{"product_id":"dinan-performance-spring-set-2013-2018-bmw-335i-340i-xdrive","title":"Dinan Performance Spring Set – 2013-2018 BMW 335i \/ 340i xDrive (F30) | 30% Stiffer | Lowering Springs | Chrome Silicon (D100-0912)","description":"\u003ch3\u003eDinan Performance Spring Set – 2013–2018 BMW 335i \/ 340i xDrive (F30) | 30% Increased Spring Stiffness | Lowered Ride Height | CNC-Wound Chrome Silicon | Factory Electronic Shock Compatible\u003c\/h3\u003e\u003cp\u003eThe Dinan Performance Spring Set for the 2013–2018 BMW 335i and 340i xDrive (F30) is a complete set of CNC-wound chrome silicon performance lowering springs engineered to reduce body roll, improve suspension geometry, lower the vehicle's ride height, and deliver a more controlled, confidence-inspiring driving experience — while maintaining compatibility with the factory electronic shock absorbers. Dinan's suspension systems are engineered to transform the stance and handling of the vehicle without sacrificing ride quality — achieved by pairing the spring set with Dinan's corresponding Ride Quality and Handling Kit (sold separately, strongly recommended) to maintain correct suspension travel and ride quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Dinan Performance Spring Sets should be purchased and installed with the corresponding Dinan Ride Quality and Handling Kit to achieve the advertised ride height, handling performance, and ride quality. Installing the spring set without the corresponding handling kit will result in poor ride quality and improper handling characteristics. Dinan's warranty on handling and ride quality claims applies only when both components are installed together.\u003c\/p\u003e\u003ch4\u003eRide Height Reduction:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW 335i xDrive (F30):\u003c\/strong\u003e Lowered 3\/4\" in the front and 3\/4\" in the rear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMW 340i xDrive (F30):\u003c\/strong\u003e Lowered 1\" in the front and 1-1\/8\" in the rear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e30% increase in spring stiffness — 30% stiffer than the factory springs — reduces rear suspension compression under acceleration and front suspension dive under braking for a more controlled, planted feel\u003c\/li\u003e\n\u003cli\u003eSubstantial reduction in body roll — the increased spring rate significantly reduces body roll in cornering — making the steering more responsive to driver input at speeds from 20 mph to the vehicle's top speed\u003c\/li\u003e\n\u003cli\u003eImproved suspension geometry — the lowered ride height improves the F30's suspension geometry for improved mechanical grip and handling precision\u003c\/li\u003e\n\u003cli\u003eCompatible with factory electronic shocks — compatible with both conventional and factory electronic (EDC) shock absorbers — no shock replacement required for installation\u003c\/li\u003e\n\u003cli\u003eCNC-wound chrome silicon wire — springs are CNC wound from high-tensile chrome silicon wire for precise spring rate consistency and long-term durability\u003c\/li\u003e\n\u003cli\u003eShot-peened for stress relief — shot-peening process relieves surface stress in the spring wire — engineered to last the life of the car without spring sag\u003c\/li\u003e\n\u003cli\u003ePreset to prevent spring sag — springs are preset during manufacturing to prevent sag over time — maintaining the correct ride height and spring rate throughout the spring's service life\u003c\/li\u003e\n\u003cli\u003eImproved grip at speed — the reduced body roll and improved suspension geometry provide a noticeable improvement in grip for high-speed driving situations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eDinan Suspension Philosophy — Springs + Handling Kit:\u003c\/h4\u003e\u003cp\u003eDinan's suspension systems are unique in the BMW aftermarket because they are engineered as a system — not just a spring set. The Performance Spring Set works in tandem with Dinan's Ride Quality and Handling Kit (bump stops, spring perches, or both depending on application) to maintain correct suspension travel while achieving the lowered ride height and increased spring rate. Without the handling kit, the increased spring rate and reduced ride height can result in the suspension running out of travel — causing harsh impacts over bumps and compromised handling. With the handling kit installed, the suspension travel is correctly maintained and the Dinan system delivers the smooth, controlled ride quality that Dinan customers expect. Dinan sells each component separately but strongly recommends purchasing and installing both together.\u003c\/p\u003e\u003ch4\u003eF30 335i \/ 340i xDrive — Platform Context:\u003c\/h4\u003e\u003cp\u003eThe 2013–2018 BMW 335i and 340i xDrive (F30) are among the most capable and popular BMW performance sedans — combining the turbocharged N55 (335i) or B58 (340i) inline-six with xDrive all-wheel drive for exceptional all-weather performance. The F30's suspension is well-engineered from the factory but benefits significantly from Dinan's spring set upgrade — the 30% increase in spring stiffness and lowered ride height transform the F30's handling character from a comfortable sports sedan to a more focused, driver-oriented machine without compromising the daily-driver usability that makes the F30 platform so popular.\u003c\/p\u003e\u003ch4\u003eSpecifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Dinan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e dnnD100-0912\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode:\u003c\/strong\u003e D100-0912\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Rate Increase:\u003c\/strong\u003e 30% over factory\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRide Height Reduction (335i xDrive):\u003c\/strong\u003e 3\/4\" front \/ 3\/4\" rear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRide Height Reduction (340i xDrive):\u003c\/strong\u003e 1\" front \/ 1-1\/8\" rear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CNC-wound high-tensile chrome silicon wire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreatment:\u003c\/strong\u003e Shot-peened for stress relief\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShock Compatibility:\u003c\/strong\u003e Conventional and factory electronic (EDC) shocks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 2013–2018 BMW 335i xDrive \/ 340i xDrive — F30\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Information:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2013–2018 BMW 335i xDrive — F30 — N55 engine\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2016–2018 BMW 340i xDrive — F30 — B58 engine\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003exDrive (AWD) variants — verify RWD (non-xDrive) compatibility separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Must be installed with the corresponding Dinan Ride Quality and Handling Kit for correct ride height, ride quality, and handling performance. Verify your specific F30 model year and drivetrain configuration before ordering. Professional installation by an experienced BMW suspension specialist strongly recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhat's Included:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDinan Performance Spring Set — 2013–2018 BMW 335i \/ 340i xDrive F30 (dnnD100-0912)\u003c\/li\u003e\n\u003cli\u003eFront springs (pair)\u003c\/li\u003e\n\u003cli\u003eRear springs (pair)\u003c\/li\u003e\n\u003cli\u003eRefer to Dinan's product documentation for complete kit contents\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eInstallation Notes:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProfessional installation by an experienced BMW suspension specialist strongly recommended — spring replacement on the F30 requires correct spring compressor tools, correct spring perch orientation, and a four-wheel alignment after installation\u003c\/li\u003e\n\u003cli\u003eInstall with the corresponding Dinan Ride Quality and Handling Kit — do not install the spring set alone\u003c\/li\u003e\n\u003cli\u003eA four-wheel alignment is required after installation — do not drive at speed before alignment is performed\u003c\/li\u003e\n\u003cli\u003eVerify correct spring seating in the upper and lower spring perches after installation — incorrect spring seating will cause noise and handling issues\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy Dinan?\u003c\/h4\u003e\u003cp\u003eDinan is the most respected BMW performance tuning brand in North America — an American company with decades of BMW-specific engineering experience and a product lineup that covers engine, suspension, braking, and exhaust upgrades for a wide range of BMW platforms. Dinan's suspension systems are engineered specifically for BMW's suspension geometry and electronic systems — delivering handling improvements that work with the factory electronics rather than against them. For F30 335i and 340i xDrive owners who want a quality lowering spring set from the most trusted BMW performance brand in North America, dnnD100-0912 is the correct choice.\u003c\/p\u003e\u003ch4\u003ePerfect For:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e2013–2018 BMW 335i and 340i xDrive (F30) owners who want Dinan's performance spring set for a 30% stiffer spring rate, reduced body roll, improved suspension geometry, and a lowered ride height — installed with the corresponding Dinan Ride Quality and Handling Kit for correct ride quality and handling performance\u003c\/li\u003e\n\u003cli\u003eF30 xDrive owners who want a factory electronic shock-compatible lowering spring upgrade from the most trusted BMW performance brand in North America\u003c\/li\u003e\n\u003cli\u003eBMW enthusiasts who want Dinan's engineered-as-a-system suspension approach — CNC-wound chrome silicon springs, shot-peened for longevity, preset against sag, and designed to work with the factory EDC electronics\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e Must be installed with the corresponding Dinan Ride Quality and Handling Kit — installing without the handling kit will result in poor ride quality and improper handling. Verify F30 335i or 340i xDrive fitment before ordering. Four-wheel alignment required after installation. Professional BMW suspension specialist installation strongly recommended.\u003c\/p\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":43317066203303,"sku":"dnnD100-0912","price":492.16,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/d100-0912_1.jpg?v=1683727417"},{"product_id":"dinan-supplemental-ride-quality-handling-kit-2014-2020-bmw-340i-428i-430i-435i-440i-435i-440i","title":"Dinan Supplemental Ride Quality \u0026 Handling Kit – 2014-2020 BMW 340i \/ 428i \/ 430i \/ 435i \/ 440i (F30\/F32\/F36) | 4x Progressive Bump Stops (D193-3201)","description":"\u003ch3\u003eDinan Supplemental Ride Quality \u0026amp; Handling Kit – 2014–2020 BMW 340i \/ 428i \/ 430i \/ 435i \/ 440i (F30\/F32\/F36) | 4x Progressive-Rate Bump Stops | Tuned for Dinan Performance Springs\u003c\/h3\u003e\u003cp\u003eThe Dinan Supplemental Ride Quality \u0026amp; Handling Kit for the 2014–2020 BMW 340i, 428i, 430i, 435i, and 440i (F30\/F32\/F36 chassis) is a set of four progressive-rate bump stops engineered to work in tandem with Dinan's Performance Spring Sets — maximizing suspension travel on the lowered vehicle, preventing bottoming out, and amplifying both handling performance and ride quality beyond what the spring set alone can achieve. This kit is the essential companion to Dinan's Performance Spring Set for these BMW platforms — Dinan strongly recommends purchasing and installing both together for correct ride height, ride quality, and handling performance.\u003c\/p\u003e\u003ch4\u003eWhy the Handling Kit Is Essential:\u003c\/h4\u003e\u003cp\u003eWhen a vehicle is lowered with performance springs, the reduced ride height compresses the suspension's available travel. Without correctly tuned bump stops, the suspension can reach the end of its travel over sharp bumps or during hard cornering — causing a sudden, harsh \"bottoming out\" that is both uncomfortable and detrimental to handling. Dinan's progressive-rate bump stops solve this problem by providing a carefully tuned secondary spring rate as the suspension approaches full compression — allowing the suspension to use its full available travel progressively rather than hitting a hard stop. The result is a lowered vehicle that rides smoothly over bumps, maintains correct suspension travel, and delivers improved mechanical grip and cornering power compared to a spring-only installation.\u003c\/p\u003e\u003ch4\u003eKey Features:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4x progressive-rate bump stops — four bump stops (front and rear) made from OE-quality material with progressive rate characteristics — the bump stop rate increases progressively as the suspension compresses, providing a smooth transition rather than a sudden hard stop\u003c\/li\u003e\n\u003cli\u003eTuned for Dinan springs — the bump stops are carefully tuned specifically for use with Dinan's Performance Spring Sets — the progressive rate is calibrated to complement Dinan's spring rates for the correct balance of ride quality and handling performance\u003c\/li\u003e\n\u003cli\u003eMaximizes suspension travel — by allowing full compression travel within the spring, the bump stops prevent the sudden bottoming out that is a common side effect of lowering a vehicle without correctly tuned bump stops\u003c\/li\u003e\n\u003cli\u003eImproved mechanical grip — correctly tuned bump stops optimize the effective spring rate through the full range of suspension travel — rewarding drivers with added mechanical grip and cornering power\u003c\/li\u003e\n\u003cli\u003eOE quality material — bump stops are manufactured from OE-quality material for progressive characteristics and long-term durability — correct material specification for the F30\/F32\/F36 suspension environment\u003c\/li\u003e\n\u003cli\u003eAmplifies spring set performance — the handling kit amplifies both performance and comfort when paired with Dinan's Performance Spring Set — the complete Dinan suspension system delivers results that neither component achieves alone\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProgressive Bump Stops — How They Work:\u003c\/h4\u003e\u003cp\u003eA bump stop is a rubber or polyurethane component that sits between the suspension's upper mount and the shock absorber body. As the suspension compresses toward full travel, the bump stop contacts the shock body and begins to provide an additional spring rate — slowing the suspension's compression rate and preventing a hard bottom-out. A progressive-rate bump stop increases its rate as it compresses further — providing a gentle initial contact that becomes progressively firmer as the suspension approaches full compression. This progressive characteristic is what allows Dinan's system to maintain ride quality while preventing bottoming out — the transition from spring rate to bump stop rate is smooth and controlled rather than sudden and harsh.\u003c\/p\u003e\u003ch4\u003eSpecifications:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Dinan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e dnnD193-3201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode:\u003c\/strong\u003e D193-3201\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents:\u003c\/strong\u003e 4x progressive-rate bump stops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e OE-quality progressive-rate material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 2014–2020 BMW 340i \/ 428i \/ 430i \/ 435i \/ 440i — F30 \/ F32 \/ F36\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Information:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2016–2018 BMW 340i — F30 sedan — B58\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2014–2016 BMW 428i — F32 coupé \/ F36 Gran Coupé — N20\/N26\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2017–2020 BMW 430i — F32 coupé \/ F36 Gran Coupé — B48\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2014–2016 BMW 435i — F32 coupé \/ F36 Gran Coupé — N55\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2017–2020 BMW 440i — F32 coupé \/ F36 Gran Coupé — B58\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eVerify your specific BMW model, year, and chassis code before ordering — confirm that dnnD193-3201 is the correct handling kit for your specific vehicle and the corresponding Dinan spring set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e This kit is designed for use with the corresponding Dinan Performance Spring Set. Installing without Dinan springs may not provide the intended results. Professional installation by an experienced BMW suspension specialist strongly recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhat's Included:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4x Dinan progressive-rate bump stops — 2014–2020 BMW 340i\/428i\/430i\/435i\/440i F30\/F32\/F36 (dnnD193-3201)\u003c\/li\u003e\n\u003cli\u003eRefer to Dinan's product documentation for complete kit contents and installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eInstallation Notes:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProfessional installation by an experienced BMW suspension specialist strongly recommended — bump stop installation requires correct spring compressor tools and correct reassembly of the strut\/shock assembly\u003c\/li\u003e\n\u003cli\u003eInstall simultaneously with the Dinan Performance Spring Set for correct results — the bump stops and springs are designed to work together as a system\u003c\/li\u003e\n\u003cli\u003eA four-wheel alignment is required after suspension installation — do not drive at speed before alignment is performed\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy Dinan?\u003c\/h4\u003e\u003cp\u003eDinan is the most respected BMW performance tuning brand in North America — an American company with decades of BMW-specific engineering experience. Dinan's suspension systems are engineered as a complete system — the Performance Spring Set and Supplemental Ride Quality \u0026amp; Handling Kit work together to deliver the correct balance of lowered ride height, increased spring stiffness, and maintained suspension travel that defines the Dinan suspension experience. For F30\/F32\/F36 owners who want the complete Dinan suspension system with correctly tuned progressive bump stops, dnnD193-3201 is the correct companion kit to the Dinan Performance Spring Set.\u003c\/p\u003e\u003ch4\u003ePerfect For:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e2014–2020 BMW 340i, 428i, 430i, 435i, and 440i (F30\/F32\/F36) owners installing the Dinan Performance Spring Set who need the corresponding Supplemental Ride Quality \u0026amp; Handling Kit for correct suspension travel, ride quality, and handling performance\u003c\/li\u003e\n\u003cli\u003eF30\/F32\/F36 owners who want the complete Dinan suspension system — progressive-rate bump stops tuned specifically for Dinan springs that maximize suspension travel, prevent bottoming out, and amplify mechanical grip and cornering power\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Designed for use with the corresponding Dinan Performance Spring Set — install both together for correct results. Verify BMW model, year, and chassis code before ordering. Four-wheel alignment required after installation. Professional BMW suspension specialist installation strongly recommended.\u003c\/p\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":43317066694823,"sku":"dnnD193-3201","price":222.13,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/d193-3201.jpg?v=1683727489"}],"url":"https:\/\/www.straightsiximports.com\/collections\/dinan.oembed","provider":"Straight Six Imports","version":"1.0","type":"link"}