ACT 2010 Hyundai Genesis Coupe HD/Race Sprung 6 Pad Clutch Kit

The ACT HY4-HDG6 is a ceramic 6-pad race clutch for the V6 Hyundai Genesis Coupe, the 3.8L six-speed car built from 2010 through 2012. Our listing is titled for the 2010 model. It is meant for the owner whose 3.8 now has headers, a tune, an intake manifold swap or nitrous and whose factory clutch slips on a hard pull through third, or for a coupe that sees drift days and road course sessions where an organic disc overheats and fades.

What the HY4-HDG6 does in a 3.8 Genesis Coupe

ACT rates this kit at 520 ft-lb at the crank, 61 percent more than the original clutch. The holding power comes from the HY013 Heavy Duty pressure plate, whose diaphragm is designed by ACT to raise clamp load and cut deflection, paired with the 6250308-1 disc: six ceramic pads on a 250 mm (9.8 in) sprung hub with a 1 in input spline. Ceramic friction runs far hotter than organic before it glazes, which is why a clutch of this type survives repeated launches and clutch kicks that would cook a street disc.

The hub springs matter on this car. They absorb part of the torsional shock that a rigid puck disc would send straight into the gearbox and differential. Even so, ACT describes the engagement as aggressive, with light to moderate pedal effort and OE to mild gear rattle. Shifts are quick, but slipping the clutch gently in a parking garage is not what this disc is good at.

One detail that sets this kit apart from many ACT race kits: ACT notes the HY4-HDG6 is designed for use with the stock dual-mass flywheel. You are not forced into a single-mass conversion, although ACT does offer one for this engine.

Symptoms that call for a race clutch on the 3.8

• RPM jumps without a gain in speed at full throttle in third or fourth
• Clutch that holds when cold but slips after a few drift runs or track laps
• Burnt friction smell and a pedal engagement point that keeps moving up
• Chatter on takeoff from a glazed or heat-checked friction face
• Bearing whir or chirp that changes as the pedal goes down

A slipping manual clutch does not set a trouble code by itself, so feel and a simple load test are how it gets diagnosed.

How to confirm before buying

Rule out the cheap causes first. A weak master or slave cylinder, air in the line or a pedal that is not fully returning can hold the clutch partly released and imitate a worn disc. Check for engine oil on the bellhousing seam, because a leaking rear main seal will soak any new disc. Then, in fourth or fifth gear at low rpm, go to full throttle: if the tach rises faster than road speed, the clutch is slipping. Our slipping diagnosis guide walks through the test, and flare vs. slip helps separate a clutch problem from a driveline one.

Fitment

ACT lists the HY4-HDG6 for every 3.8 V6 Genesis Coupe from 2010 through 2012: base, GT, Grand Touring, R-Spec and Track. It does not fit the 2.0T four-cylinder coupe, which uses ACT's HY3 kits, and it does not fit the 2013-up refresh cars. If your coupe has had an engine or gearbox swap, or you are not sure which clutch is in it, send us the year and VIN before ordering and we will confirm. More clutch parts are in our rebuild kits category.

If the car is a weekend street car rather than a track toy, the organic HY4-HDSS Heavy Duty street kit uses the same plate with a smoother disc.

Install notes

• Per ACT the box holds the HY013 pressure plate, 6250308-1 disc and AT23 alignment tool. No release bearing or pilot bearing is included, so buy a new release bearing and pilot bearing for the job; a slide hammer such as the OTC 1172 puller removes the old pilot cleanly.
• Inspect the factory dual-mass flywheel for free play, cracks and heat spots. If it is tired, the ACT 600725 Streetlite is the single-mass option ACT pairs with this kit; it comes with a pilot bearing.
• Center the disc with the alignment tool and draw the pressure plate bolts down evenly in a star pattern.
• Check the fork, pivot and slave cylinder while the transmission is out, and bleed the hydraulics with fresh brake fluid.
• Bed the ceramic disc in with a few controlled hard slips, as ACT recommends for race discs, without overheating it.

Does the HY4-HDG6 fit the 2.0T Genesis Coupe?

No. ACT lists HY4 kits only for the 3.8L V6 Genesis Coupe from 2010 to 2012. The 2.0T turbo four uses ACT's HY3 kits, and the 2013-up cars use different clutches again.

Do I need an aftermarket flywheel with this kit?

No. ACT states the HY4-HDG6 is designed for use with the stock dual-mass flywheel. Replace or upgrade the flywheel only if it is worn, cracked or has excessive free play; the ACT 600725 Streetlite is the single-mass option.

Is a release bearing included?

No. ACT's kit contents are the HY013 pressure plate, the 6250308-1 6-pad sprung disc and the AT23 alignment tool. Plan on a new release bearing and pilot bearing for the install.

Is a 6-pad ceramic clutch livable on the street?

It can be driven daily, but ACT calls the engagement aggressive. Expect an on-off feel at takeoff and some extra care in stop-and-go traffic. For mostly street use, the organic HY4-HDSS is smoother.

How much torque will it hold?

ACT rates the HY4-HDG6 at 520 ft-lb measured at the crank, 61 percent over the factory clutch.

• How to Diagnose Transmission Slipping
• Shift Flare vs. Slip: How to Tell Them Apart
• Automatic vs. Manual Transmission Repair Cost