Competition Clutch Nodular Iron SMF Flywheel – 2003–2006 Nissan 350Z / 2003–2007 Infiniti G35 | 25.6 lb Direct Bolt-In

The Competition Clutch Nodular Iron Single Mass Flywheel (SMF) for the 2003–2006 Nissan 350Z and 2003–2007 Infiniti G35 is a direct bolt-in replacement flywheel engineered from nodular iron — a stronger, more durable material than the OEM flywheel — at a price point that makes replacement more cost-effective than resurfacing the factory unit. At 25.6 lbs, this is a full-weight SMF replacement — maintaining the factory flywheel's rotational mass characteristics for smooth, streetable clutch engagement while delivering the material strength advantage of nodular iron construction. For 350Z and G35 owners replacing their clutch who want a new flywheel rather than a resurfaced OEM unit, the Competition Clutch nodular iron flywheel is the correct, cost-effective choice.

Key Features:

• Nodular iron construction — stronger than the OEM flywheel material — superior resistance to heat cracking, surface wear, and structural fatigue compared to standard grey iron OEM flywheels
• Direct bolt-in fitment — engineered as a direct replacement for the factory flywheel on the 2003–2006 Nissan 350Z and 2003–2007 Infiniti G35 — no modification required
• 25.6 lb weight — full-weight SMF replacement maintaining factory rotational mass characteristics for smooth, streetable clutch engagement and drivability
• Single mass flywheel (SMF) — solid single-mass design — correct replacement for the factory SMF on the 350Z and G35
• Replace, don’t resurface — a new nodular iron flywheel eliminates the cost, delay, and uncertainty of flywheel resurfacing — a fresh friction surface guaranteed from the first use
• Competition Clutch quality — manufactured by Competition Clutch, a respected performance clutch and drivetrain component brand

Why Replace Instead of Resurface?

• Cost and Convenience: Flywheel resurfacing requires removing the flywheel, sending it to a machine shop, waiting for the resurface, and reinstalling — adding time, cost, and a second disassembly/reassembly cycle to the clutch replacement job. A new Competition Clutch nodular iron flywheel eliminates the machine shop step entirely — install directly from the box with a guaranteed fresh friction surface.
• Resurfacing Limits: Flywheels can only be resurfaced a limited number of times before the friction surface is too thin to safely resurface again. A flywheel that has been resurfaced previously may not have sufficient material remaining for another safe resurface — making replacement the only correct option. A new flywheel eliminates this uncertainty.
• Heat Cracking: High-performance and track use subjects flywheels to elevated temperatures that can cause heat cracking in the friction surface. A cracked flywheel cannot be safely resurfaced and must be replaced. The Competition Clutch nodular iron flywheel’s superior material strength provides better resistance to heat cracking than standard OEM grey iron flywheels.
• Nodular Iron Advantage: Nodular iron (also known as ductile iron) has a higher tensile strength and greater ductility than the grey cast iron used in many OEM flywheels — providing superior resistance to cracking under thermal and mechanical stress. For performance and track applications where the flywheel is subjected to elevated temperatures and repeated high-load clutch engagements, nodular iron’s material advantage translates directly to longer service life and greater reliability.

Specifications:

• Brand: Competition Clutch
• Part Number: COMPBD-06072-116
• Barcode: BD-06072-116
• Material: Nodular iron
• Type: Single mass flywheel (SMF)
• Weight: 25.6 lbs (flywheel) / 26.5 lbs (shipping weight)
• Application: 2003–2006 Nissan 350Z / 2003–2007 Infiniti G35

Fitment Information:

• 2003–2006 Nissan 350Z — verify manual transmission fitment for your specific 350Z model year and trim
• 2003–2007 Infiniti G35 — verify manual transmission fitment for your specific G35 model year and body style (coupe / sedan)
• Manual transmission only — this flywheel is for manual transmission 350Z and G35 models only. Automatic transmission models do not use a clutch flywheel.
• Note: Verify manual transmission fitment for your specific 350Z or G35 model year and trim before ordering. Confirm that the VQ35DE engine in your vehicle uses the same flywheel specification as this part number.

What’s Included:

• Competition Clutch nodular iron SMF flywheel — 2003–2006 Nissan 350Z / 2003–2007 Infiniti G35 (COMPBD-06072-116)
• Note: Flywheel bolts are not included — new flywheel-to-crankshaft bolts are strongly recommended and must be sourced separately. Do not reuse old flywheel bolts.

Installation Notes:

• Professional installation by an experienced drivetrain specialist strongly recommended — flywheel replacement requires correct torque specifications and correct clutch alignment procedure
• Do not reuse old flywheel bolts — flywheel-to-crankshaft bolts are torque-to-yield fasteners on many applications and must be replaced with new bolts at each installation. Source new OEM or equivalent flywheel bolts before installation.
• Clean the crankshaft flange and flywheel mating surface thoroughly before installation — any oil, grease, or debris on the mating surface will affect flywheel runout and clutch engagement quality
• Verify flywheel runout after installation using a dial indicator — excessive runout indicates incorrect installation or a damaged crankshaft flange
• Install a new clutch disc and pressure plate alongside the new flywheel — installing a new flywheel with a worn clutch disc or pressure plate wastes the flywheel replacement and will result in premature clutch failure
• Use a clutch alignment tool to correctly centre the clutch disc before torquing the pressure plate — incorrect disc alignment will prevent correct gearbox installation
• Bed in the new clutch correctly after installation — avoid aggressive clutch engagement for the first 500–1,000 km to allow the friction material to seat correctly against the new flywheel surface

Why Competition Clutch?

Competition Clutch is a performance clutch and drivetrain component brand with a strong following in the Japanese performance community — known for their clutch kits, flywheels, and drivetrain components for a wide range of Japanese performance platforms including the 350Z/G35, SR20DET, RB26, 4G63, and many others. Competition Clutch’s nodular iron flywheel lineup provides a cost-effective, quality alternative to OEM flywheel resurfacing — delivering a stronger material, a guaranteed fresh friction surface, and direct bolt-in fitment at a price point that makes replacement the correct choice over resurfacing in most clutch replacement scenarios.

Perfect For:

• 2003–2006 Nissan 350Z and 2003–2007 Infiniti G35 manual transmission owners replacing their clutch who want a new flywheel rather than a resurfaced OEM unit
• 350Z and G35 owners whose factory flywheel is heat-cracked, excessively worn, or has been resurfaced previously and cannot be safely resurfaced again
• Performance and track builds where nodular iron’s superior strength and heat crack resistance over OEM grey iron is a meaningful durability advantage
• Owners completing a full clutch system replacement — new flywheel, new clutch disc, new pressure plate, and new release bearing — for a complete drivetrain refresh

Note: Manual transmission only. Do not reuse old flywheel bolts — source new bolts before installation. Install alongside a new clutch disc and pressure plate. Verify 350Z / G35 model year and manual transmission fitment before ordering. Bed in correctly after installation.