Spec 09-10 Hyundai Genesis Coupe 3.8L V6 Steel Flywheel
SPEC SY38S is a single-piece steel flywheel for the early Hyundai Genesis Coupe with the 3.8L V6 and six-speed manual. Our listing covers the 2009 to 2010 production cars. Buyers usually land here for one of two reasons: the factory dual-mass flywheel has started to rattle, clunk or shudder, or they are installing a SPEC clutch that SPEC says must run on a SPEC flywheel.
The flywheel bolts to the back of the crankshaft, carries the starter ring gear and gives the clutch disc the friction face it clamps against. The stock 3.8 manual uses a dual-mass flywheel, which has internal springs that soak up driveline vibration but wear out and cannot be resurfaced like a solid part. SY38S replaces it with one solid steel piece, so there are no springs or inner mass to develop play. SPEC lists a shipping weight of about 30 lb for the part.
The important detail is the clutch it is built for. SPEC lists SY38S for Genesis Coupe 3.8 cars with the non-ratcheting clutch, built through 22 December 2011. SPEC's Stage 1 SY381-2 and Stage 3 SY383-2 kits for those cars both require a SPEC flywheel, and SY38S is the one that matches them.
Idle the car in neutral and work the pedal while someone listens near the bellhousing. Noise that changes with the pedal points to the flywheel or the release bearing rather than the engine or gearbox internals. With the transmission removed, try to twist the two halves of the dual-mass flywheel against each other; excessive free rotation or a gritty feel means it is finished. If the main complaint is slip, run the roll-on test in our slipping diagnosis guide first, and use the flare vs. slip article to describe what you feel.
Our listing is for the 2009 to 2010 Hyundai Genesis Coupe 3.8 V6 with the manual transmission. SPEC's own fitment for SY38S runs from the 2009 start of production through cars built on 22 December 2011, with the non-ratcheting clutch. Cars built from January 2012 on, and the 2013 and later 3.8, use a different SPEC clutch (SY831-2, sold here as the 2012-15 Stage 1 kit), so check the build date on the driver door jamb label. The 2.0T four-cylinder is also different and uses a different SPEC flywheel, SY00S-2. If you are not sure which car you have, send us the VIN and build date before ordering. More flywheels and clutch parts are listed under hard parts.
| Brand | SPEC |
| Part number | SY38S |
| Fits | Spec 09-10 Hyundai Genesis Coupe 3.8L V6 Steel Flywheel |
| Vehicle fitment | Hyundai Genesis Coupe (2009-2010) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
The 3.8 V6 manual cars with the early non-ratcheting clutch. SPEC lists cars built from 2009 through 22 December 2011. Our listing covers the 2009 to 2010 cars, so send your VIN and build date if your car is a later 2011 or a 2012.
No. The 2.0T uses a different SPEC flywheel, SY00S-2.
Yes for the early 3.8 kits. SPEC's SY381-2 Stage 1 and SY383-2 Stage 3 kits for these cars state that a SPEC flywheel is required, and SY38S is the matching part.
No. SPEC lists the January 2012 and later 3.8 cars, including 2013 to 2016, under a different clutch (SY831-2), not this flywheel.
Some extra gear rattle at idle is normal with a solid flywheel, because it has no dual-mass springs to absorb driveline vibration.
SPEC lists the shipping weight at about 30 lb.
