Spec 03-06 350z Stage 3 Clutch kit
The SPEC SN353 is a Stage 3 single-disc clutch for the VQ35DE Nissan 350Z, built for owners who have added a supercharger, turbo kit or nitrous and found that the factory clutch, or a mild Stage 1 or 2, no longer holds. It is a step into aggressive territory: a carbon semi-metallic 6-puck disc rated by SPEC at 525 ft-lb, well beyond what a naturally aspirated 2003-2006 Z makes.
The 350Z clutch sits between the VQ35DE flywheel and the 6-speed manual, released by a fork and hydraulic slave cylinder. SPEC describes its Stage 3 disc as a carbon semi-metallic 6-puck made for street and race cars that need an aggressive but streetable engagement. Six pucks concentrate clamp load on less friction area, so the disc bites quickly and resists heat from repeated launches and track laps. Expect a shorter engagement window and some chatter when slipping it from a stop, especially when cold.
On SPEC's 350Z chart the ladder runs Stage 1 SN351 (385 ft-lb), Stage 2 SN352 (439), Stage 2+ SN353H (494), Stage 3 SN353 (525) and Stage 3+ SN353F (610). If the car is mostly a commuter with light bolt-ons, a lower stage will be more pleasant; the SN353 makes sense once torque is climbing past what the Kevlar and multi-friction discs are rated for. SPEC lists the kit at 19 lb. The flywheel is sold separately.
Do a fourth-gear pull from about 2,500 RPM. RPM rising faster than road speed means the clutch is slipping; our slipping diagnosis guide covers the test and flare vs. slip helps if you are unsure. Check the slave cylinder for leaks and bleed the system first, since a hydraulic fault can mimic a worn clutch; our engagement-point guide lists the causes. Oil on the bellhousing from a rear main seal will contaminate any new disc.
SPEC lists SN353 for the 2003-2006 Nissan 350Z and the 2003-2007 Infiniti G35 (VQ35DE manual cars), plus 2001-2004 Frontier and 2002-2004 Xterra 3.3L supercharged trucks and VK56DE swaps into an early Z33 fork-type transmission. It is not listed for the 2007-2008 350Z with the VQ35HR or for any 370Z; those cars use the VQ35HR/VQ37HR Stage 3 kit. If your car has a swapped transmission or a non-stock flywheel, send us the year and VIN before ordering.
Comparing options for the same car: the Clutch Masters FX400 6-puck and the Competition Clutch VQ35DE Stage 3 are other high-holding choices.
| Brand | SPEC |
| Part number | SN353 |
| Fits | Spec 03-06 350z Stage 3 Clutch kit |
| Vehicle fitment | Nissan 350Z (2003-2006) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
SPEC lists SN353 for the 2003-2006 350Z with the VQ35DE. The 2007-2008 VQ35HR cars and the 370Z use different kits, so send us your VIN if you are unsure.
SPEC rates SN353 at 525 ft-lb, above its Stage 1 (385), Stage 2 (439) and Stage 2+ (494) kits for the same car.
SPEC calls it an aggressive but streetable engagement. It drives on the street, but expect a quicker bite and some chatter from a stop compared with an organic or Kevlar disc.
No. SPEC sells its 350Z aluminum (SN35A) and steel (SN35S) flywheels separately. Resurface or replace your flywheel during the install.
SPEC lists it for the 2003-2007 G35. Confirm with your VIN if the car has been converted or uses a non-factory flywheel.
Inspect it and replace it if it shows any leak, since a weak slave lets a new clutch drag or engage at the wrong point.
