Competition Clutch VQ35HR/VQ37HR Stage 2 - Steelback Brass Plus Clutch Kit
If your 370Z, G37 or 2007-2008 350Z has started slipping in the upper gears after an intake, exhaust and tune, or the original clutch is simply worn out, Competition Clutch 6073-2100 is their Stage 2 street kit for the VQ35HR and VQ37HR cars. It adds holding power over stock while keeping a pedal and engagement you can live with in traffic.
The kit replaces the factory pressure plate, disc and throwout bearing with a Competition Clutch performance pressure plate and a single full-face disc. A full-face disc has friction material all the way around, so it engages progressively like the stock clutch rather than grabbing like a puck disc. The firmer clamp load is what adds capacity, at the cost of a slightly heavier pedal.
Be aware that Competition Clutch describes this part two ways. The Stage 2 family copy calls it a Brass Plus disc with alloy backing rated at up to 80 percent more torque capacity, and our listing title follows that name. The specification table and product copy for 6073-2100 itself list an organic full-face disc with a 40-50 percent increase. Either way, this is a street and light-track clutch, not a boost clutch.
Per the spec table, the kit includes:
No flywheel and no pilot bushing are included, so plan to buy the pilot bearing separately.
Do a sixth-gear roll-on from low rpm and watch for the tach climbing ahead of speed. On these cars, also rule out the hydraulic side: a failing slave cylinder or air in the line causes a soft pedal, grinding into gear and a clutch that will not fully release, which no clutch kit will fix. Our clutch won't disengage guide covers that, and the slipping diagnosis guide walks through the road test. If you are weighing a clutch job against other drivetrain repairs, see manual vs automatic repair cost.
Competition Clutch lists 6073-2100 for the 2007-2011 Nissan 350Z and 370Z and the 2007-2013 Infiniti G35 and G37 with a manual transmission, which means the VQ35HR and VQ37HR engines. It does not fit the 2003-2006 VQ35DE cars, which take the 6072-2100 Stage 2 kit. The maker's listing stops at the 2011 370Z; if you have a 2012 or later 370Z, send us the year and VIN and we will confirm before it ships. Some 2007 G35 models still carried the VQ35DE, so check the engine code on early cars. Browse more options on our rebuild kits page.
| Brand | Competition Clutch |
| Part number | 6073-2100 |
| Fits | Competition Clutch VQ35HR/VQ37HR Stage 2 - Steelback Brass Plus Clutch Kit |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Competition Clutch lists it for the 2007-2011 Nissan 350Z and 370Z and the 2007-2013 Infiniti G35 and G37 with a manual transmission (VQ35HR and VQ37HR). For a 2012 or later 370Z, send us your VIN to confirm.
No. The 2003-2006 350Z uses the VQ35DE and takes the 6072-2100 Stage 2 kit instead.
Competition Clutch's Stage 2 family description calls it Brass Plus with alloy backing (up to 80 percent over stock), while the 6073-2100 spec table lists an organic full-face disc with a 40-50 percent increase. Both describe a smooth, street-friendly clutch.
A pilot bearing, because none is included, and either a resurfaced or new flywheel. Fresh brake fluid for bleeding the hydraulics is also a good idea.
It is designed for aggressive street driving and moderate track use. For forced induction, look at the Stage 3 or Stage 4 kits in the 6073 series.
