{"product_id":"blox-racing-b18a-b-b20-1-8l-2-0l-dohc-performance-valve-spring","title":"BLOX Racing Performance Valve Spring - Honda\/Acura B18A \/ B18B \/ B20 DOHC (BXPT-10302-SP)","description":"\u003ch3\u003eBLOX Racing Performance Valve Spring - Honda\/Acura B18A \/ B18B \/ B20 DOHC (BXPT-10302-SP)\u003c\/h3\u003e\n\u003cp\u003eUpgrade your B-series engine's valvetrain with the BLOX Racing performance valve spring. Designed for the Honda\/Acura B18A, B18B, and B20 DOHC engines, this performance spring provides increased seat pressure and open pressure over the factory spring — improving valvetrain stability at high RPM and supporting performance camshaft upgrades on B18A\/B and B20 builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: Price is per single spring. Order the quantity required for your application — a full set requires 16 springs (8 intake, 8 exhaust) for a 4-cylinder B-series engine.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePerformance valve spring for B18A, B18B, and B20 DOHC\u003c\/li\u003e\n\u003cli\u003eIncreased seat and open pressure over factory springs\u003c\/li\u003e\n\u003cli\u003eImproved valvetrain stability at high RPM\u003c\/li\u003e\n\u003cli\u003eCompatible with performance camshaft upgrades\u003c\/li\u003e\n\u003cli\u003eBLOX Racing quality and engineering\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePerformance Benefits:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Seat Pressure:\u003c\/strong\u003e Higher closed pressure keeps valves firmly seated, reducing valve float risk at high RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Open Pressure:\u003c\/strong\u003e Greater open pressure ensures valves follow cam lobe profile accurately at high RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValvetrain Stability:\u003c\/strong\u003e Reduces valve float and valvetrain instability that limits rev ceiling on stock springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam Upgrade Compatible:\u003c\/strong\u003e Higher spring rates support performance camshafts with increased lift and duration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-RPM Capability:\u003c\/strong\u003e Extends the reliable rev range of B18A\/B and B20 builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSpecifications:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e BLOX Racing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e BXPT-10302-SP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Performance Valve Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Honda\/Acura B18A, B18B, B20 DOHC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Single spring (1x)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.0 lb (per spring)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode:\u003c\/strong\u003e BXPT-10302-SP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment Information:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda\/Acura B18A\u003c\/strong\u003e — 1.8L DOHC non-VTEC (Acura Integra RS\/LS\/GS 1990-1993)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda\/Acura B18B\u003c\/strong\u003e — 1.8L DOHC non-VTEC (Acura Integra RS\/LS\/GS 1994-2001)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda B20B \/ B20Z\u003c\/strong\u003e — 2.0L DOHC non-VTEC (Honda CR-V 1997-2001, Orthia, Stepwgn)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon B20 VTEC swap applications:\u003c\/strong\u003e B20 block with B16\/B18C VTEC head — verify spring compatibility with your specific VTEC head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Verify spring dimensions (free length, seat pressure, open pressure, coil bind height) are compatible with your specific camshaft and retainer combination before ordering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Not for B16, B18C (VTEC), or other B-series variants without confirming compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional installation required — valve spring replacement requires cylinder head removal or a valve spring compressor tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat's Included:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x BLOX Racing performance valve spring (BXPT-10302-SP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e A complete B-series 4-cylinder engine requires 16 springs total (8 intake, 8 exhaust) — order 16 for a full set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e Valve spring retainers and locks (keepers) sold separately — upgrade retainers recommended when installing performance springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eInstallation Notes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003cli\u003eValve spring replacement can be performed with the head on the engine using a valve spring compressor tool, or with the head removed\u003c\/li\u003e\n\u003cli\u003eVerify piston-to-valve clearance if installing with performance camshafts\u003c\/li\u003e\n\u003cli\u003eCheck coil bind clearance with your specific camshaft lift before installation\u003c\/li\u003e\n\u003cli\u003eReplace valve stem seals at time of spring replacement\u003c\/li\u003e\n\u003cli\u003eVerify valve spring retainer and lock (keeper) compatibility with new springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat is Valve Float — and Why Springs Matter:\u003c\/h4\u003e\n\u003cp\u003eValve float occurs when the engine is revving so quickly that the valve spring cannot close the valve fast enough to follow the cam lobe's closing ramp. At the moment of float, the valve is partially open when it should be closed — allowing combustion gases to escape past the valve seat, reducing compression and power, and potentially causing valve-to-piston contact on high-compression or high-lift cam builds. Factory valve springs are designed for the stock rev limit and cam profile. As RPM increases beyond the factory limit, or when performance camshafts with higher lift and faster opening\/closing ramps are installed, the factory springs may not provide enough force to keep the valves under control. Performance valve springs with higher seat and open pressures extend the reliable rev range and support the faster valve motion demanded by performance camshafts.\u003c\/p\u003e\n\u003ch4\u003eB18A\/B — Non-VTEC B-Series Context:\u003c\/h4\u003e\n\u003cp\u003eThe B18A and B18B are Honda's 1.8L DOHC non-VTEC engines, used in the Acura Integra RS, LS, and GS from 1990-2001. While lacking the VTEC variable valve timing of the B18C, the B18A\/B is a popular platform for naturally aspirated and forced induction builds due to its strong bottom end, wide aftermarket support, and compatibility with VTEC head swaps. Performance valve springs are a common upgrade on B18A\/B builds running performance camshafts or targeting a higher rev ceiling than the factory springs support.\u003c\/p\u003e\n\u003ch4\u003eB20 — The B20 VTEC Build Platform:\u003c\/h4\u003e\n\u003cp\u003eThe B20B and B20Z are Honda's 2.0L DOHC non-VTEC engines, used in the Honda CR-V (1997-2001) and other Honda models. The B20 is most famous in the performance community as the basis for the \"B20 VTEC\" build — pairing the B20's larger 2.0L displacement and stronger bottom end with a VTEC cylinder head (typically from a B16B, B18C, or B16A) to create an engine that combines displacement with VTEC's high-RPM power delivery. The BLOX BXPT-10302-SP spring is designed for the B20's non-VTEC head — if building a B20 VTEC, verify spring compatibility with your specific VTEC head's spring seat dimensions and retainer configuration.\u003c\/p\u003e\n\u003ch4\u003eSpring Rate Selection — Matching Springs to Camshafts:\u003c\/h4\u003e\n\u003cp\u003eWhen selecting performance valve springs, it is important to match the spring's seat pressure, open pressure, and coil bind height to your specific camshaft's lift and duration specifications. A spring that is too soft will not control the valve adequately at high RPM with an aggressive cam profile. A spring that is too stiff will increase valvetrain wear and may require upgraded retainers and rocker arms to handle the increased load. BLOX Racing's BXPT-10302-SP is designed for performance B18A\/B and B20 applications — verify the spring specifications are appropriate for your specific camshaft before ordering. Consult your camshaft manufacturer's recommended spring specifications for guidance.\u003c\/p\u003e\n\u003ch4\u003eUpgrade Retainers:\u003c\/h4\u003e\n\u003cp\u003eWhen installing performance valve springs, it is strongly recommended to upgrade the valve spring retainers at the same time. Factory retainers are made from stamped steel and are designed for the load of factory springs. Performance springs with higher seat and open pressures place greater load on the retainers, and factory retainers may not provide adequate strength or the correct geometry for performance springs. Titanium or chromoly steel retainers provide the strength and weight reduction needed for high-RPM valvetrain performance. BLOX Racing and other manufacturers offer compatible retainers for B-series applications.\u003c\/p\u003e\n\u003ch4\u003eWhy BLOX Racing?\u003c\/h4\u003e\n\u003cp\u003eBLOX Racing is a respected manufacturer of Honda and Acura performance parts, known for their quality construction and correct fitment for B-series, K-series, and other Honda platforms. Their valvetrain components are trusted by Honda enthusiasts worldwide for reliable performance at a competitive price point. BLOX Racing's focus on Honda\/Acura applications ensures their valve springs are engineered to the correct specifications for B18A\/B and B20 builds.\u003c\/p\u003e\n\u003ch4\u003ePerfect For:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcura Integra RS\/LS\/GS B18A and B18B builds running performance camshafts\u003c\/li\u003e\n\u003cli\u003eHonda CR-V B20 builds wanting performance valve springs for higher RPM operation\u003c\/li\u003e\n\u003cli\u003eB20 VTEC builds — verify compatibility with your specific VTEC head before ordering\u003c\/li\u003e\n\u003cli\u003eB18A\/B builds targeting a higher rev ceiling than factory springs support\u003c\/li\u003e\n\u003cli\u003eAnyone replacing worn factory valve springs on a B18A, B18B, or B20 with a performance upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePerfect For:\u003c\/strong\u003e Honda\/Acura B18A, B18B, and B20 DOHC builds requiring BLOX Racing performance valve springs for improved valvetrain stability, higher RPM capability, and performance camshaft support.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Replace valve stem seals at the same time as the springs — if you're already in the head doing the springs, the incremental cost and time to replace the seals is minimal, and worn valve stem seals cause oil consumption and fouled spark plugs that will require the same disassembly to fix later.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSold Individually — Order 16 for Full Set:\u003c\/strong\u003e B18A, B18B, B20 DOHC. Verify spring specs match your camshaft. Upgrade retainers recommended. Replace valve stem seals at same time. Professional installation recommended.\u003c\/p\u003e\n\u003cp\u003eUpgrade your B18A\/B or B20 valvetrain with BLOX Racing performance springs — increased seat and open pressure, improved high-RPM stability, performance cam compatible.\u003c\/p\u003e","brand":"BLOX Racing","offers":[{"title":"Default Title","offer_id":48831254200487,"sku":"BLOBXPT-10302-SP","price":21.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/d68927073b37f336390990d75837622f.jpg?v=1776961660","url":"https:\/\/www.straightsiximports.com\/products\/blox-racing-b18a-b-b20-1-8l-2-0l-dohc-performance-valve-spring","provider":"Straight Six Imports","version":"1.0","type":"link"}