ACT 2004 Infiniti G35 XACT Flywheel Streetlite
The ACT 600215 is a forged chromoly XACT Streetlite flywheel for the VQ35DE manual cars: the 2003-2006 Infiniti G35 coupe and sedan, and the Nissan 350Z built through August 2006. Owners shop for it during a clutch job when the factory flywheel is scored, blued or cracked from heat, or when they want the engine to rev more freely without going to a fragile ultralight part. At 16.6 lb it is lighter than stock while remaining ACT's most durable flywheel style.
The flywheel bolts to the VQ35DE crankshaft and does three jobs: it carries the 124-tooth ring gear the starter engages, it gives the clutch disc a flat friction surface to clamp against, and its mass smooths out engine pulses at low rpm. Cutting rotating mass lets the engine gain and drop revs faster, which ACT describes as noticeably improved response and acceleration, with OE to mild gear rattle as the trade-off. The 600215 is a one-piece forging, CNC machined and dynamically balanced, with an induction-hardened ring gear. Because it is one piece there are no inserts to warp and no pressed-on ring gear to come loose.
A worn flywheel does not set a trouble code. These complaints overlap with a worn clutch, so plan on replacing both at the same time.
First separate a slipping clutch from hydraulic or gearbox trouble: our slipping diagnosis guide walks through the high-gear load test, and flare versus slip helps you describe what you feel. With the transmission out, check the friction face for heat checking, grooves and hot spots, and look at the ring gear teeth. If a machine shop says the original flywheel is past its resurfacing limit, a new flywheel costs less than a second clutch.
Our listing is titled for the 2004 Infiniti G35. ACT's application chart for 600215 covers the 2003-2006 G35 coupe and sedan with the 3.5L VQ35DE and the 2003 through August 2006 Nissan 350Z, all with a manual transmission. Later 350Z, the G35 from 2007 and the G37 and 370Z use a different flywheel; for those see the ACT 600590 Streetlite. If your car was built close to the 2006 changeover or has had an engine or gearbox swap, send us the year and VIN before ordering. Specifications from ACT: 250 mm (9.8 in) friction surface, 124 ring gear teeth, chromoly steel, SFI 1.1.
| Brand | ACT |
| Part number | 600215 |
| Fits | ACT 2004 Infiniti G35 XACT Flywheel Streetlite |
| Vehicle fitment | Infiniti G35 Xact (2004) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists 600215 for the 2003-2006 G35 coupe and sedan and the 2003 through August 2006 350Z, all VQ35DE manual cars. Later cars use the 600590 Streetlite.
ACT lists the 600215 at 16.6 lb. It is a forged one-piece chromoly flywheel with a 250 mm friction surface and 124 ring gear teeth.
Yes. ACT says its clutch systems work with stock and good-quality aftermarket flywheels, and the Streetlite is not tied to a conversion kit. Most owners install a new clutch at the same time.
ACT rates the feel as noticeably improved engine response with OE to mild gear rattle at idle, which is normal for a lighter flywheel.
Yes. ACT says XACT flywheels resurface like stock flywheels with no special process or extra parts.
