ACT 2010 Hyundai Genesis Coupe XACT Flywheel Streetlite
ACT 600725 is a one-piece chromoly Streetlite flywheel for the 2010 Hyundai Genesis Coupe 3.8 V6 with the six-speed manual. Owners usually come looking for it when the factory dual-mass flywheel starts to rattle, shudder on takeoff or knock when the clutch is released, or when a performance clutch is going in and they want a flywheel that can be resurfaced at every clutch job instead of thrown away.
The flywheel carries the starter ring gear and gives the clutch disc its rear friction face. The 600725 is forged chromoly steel, CNC machined and dynamically balanced by ACT, with a 9.8 in (250 mm) friction surface and a 125-tooth induction-hardened ring gear. Because it is a single piece, there are no springs, inserts or bolted ring gear to wear or come loose, and ACT describes its Streetlite line as considerably lighter than stock and its most durable flywheel offering. The lower inertia lets the V6 rev more freely between shifts. The trade-off ACT lists is OE to mild gear rattle, since a single-mass flywheel has no dual-mass damper. ACT also lists SFI 1.1 for this part and includes a PB1007 pilot bearing.
Many dual-mass faults sound like transmission or engine noise. With the engine idling in neutral, listen at the bellhousing as you press and release the pedal; a rattle that changes with the pedal points to the flywheel or release bearing. Once the transmission is out, check the friction face for heat cracks and rock the two halves of the dual-mass unit against each other; excessive rotation or a gritty feel means it is done. If the complaint is slip rather than noise, start with our slipping diagnosis guide, and use flare vs. slip to describe what the car is doing.
Our listing is for the 2010 Hyundai Genesis Coupe 3.8. ACT's chart for 600725 covers the 3.8 V6 Genesis Coupe from 2010 through 2012 in base, GT, Grand Touring, R-Spec and Track trims. It does not fit the 2.0T four-cylinder car, which uses a different ACT flywheel, the 600665 Streetlite. The 2013 and later 3.8 cars are also not on the 600725 chart. If you are unsure which engine or year you have, send us the VIN before ordering. More flywheels and clutch parts are listed under hard parts.
ACT offers 600725 as the flywheel option on its 3.8 Genesis Coupe clutch kits, including the street-oriented HY4-HDSS Heavy Duty kit and the race-oriented HY4-HDG6 6-pad kit. Replacing the clutch and flywheel together saves doing the job twice.
| Brand | ACT |
| Part number | 600725 |
| Fits | ACT 2010 Hyundai Genesis Coupe XACT Flywheel Streetlite |
| Vehicle fitment | Hyundai Genesis Coupe Xact (2010) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists 600725 for the 3.8 V6 Genesis Coupe only. The 2.0T uses ACT 600665.
Our listing is for the 2010 car. ACT's chart covers the 3.8 V6 Genesis Coupe from 2010 through 2012. 2013 and later cars are not on the chart.
Some. ACT lists OE to mild gear rattle for its Streetlite flywheels because a single-mass flywheel has no dual-mass damper.
Yes. ACT includes the PB1007 pilot bearing with 600725.
Yes. ACT says its flywheels are serviceable and can be resurfaced with no need to buy additional parts.
ACT offers 600725 as the flywheel option on its HY4-HDSS and HY4-HDG6 Genesis Coupe 3.8 clutch kits.
