Clutch Masters 13-14 Acura ILX FX300 Sprung Clutch Kit (Requires cmFW-320-SF)

If your 2013 or 2014 Acura ILX 2.4L six-speed has started to let the revs run away in fourth gear after an intake, header or tune, the Clutch Masters FX300 (part 08320-HRTZ-X) is the street-focused step up from a stock clutch. It is the clutch-only version of the kit: disc, pressure plate, release bearing and alignment tool, with no flywheel in the box. The K24 in the ILX needs a specific Clutch Masters flywheel to run it, so read the fitment notes below before you order.

What the FX300 clutch kit does in a 2.4L ILX

The ILX 2.4L shares its K24 engine and six-speed gearbox family with the ninth-generation Civic Si, and the factory clutch is sized for stock torque. Once the engine is breathing better, the original disc tends to glaze and slip at high rpm, which is where the K24 makes its power. The FX300 answers that with Clutch Masters' Power Plus I heavy-duty pressure plate clamping a steel-backed disc faced with segmented Kevlar. Breaking the facing into segments concentrates clamp load on less area, and that is how the maker gets a rated 110 percent gain in holding capacity over stock.

The disc keeps a sprung hub and a Marcel spring wafer under the facing, so it still drives like a daily: Clutch Masters lists only a slight rise in pedal effort and calls the Kevlar non-abrasive, meaning it is gentle on the flywheel face. It is aimed at a naturally aspirated K24 with cams or head work, a medium-boost turbo or supercharger, or up to a 100 hp nitrous shot. It is rated for street use, not track work.

Symptoms that point to the clutch

• Tach climbs faster than road speed on a full-throttle pull in the higher gears
• Slip that began after bolt-ons, a reflash or forced induction
• A burnt friction smell after a hill start or spirited drive
• Engagement point creeping toward the top of the pedal
• Judder pulling away from a stop
• A whir or chirp that changes when you push the pedal, typical of a tired release bearing

How to confirm before you buy

Run a slip test in fourth gear from about 2,000 rpm at full throttle. If engine speed jumps without a matching pull, the disc is slipping. Before blaming the disc, check the clutch fluid level and condition and look for wetness at the slave cylinder and at the bellhousing seam. A leaking rear main seal will soak a new disc, and a hydraulic fault can keep the bearing loaded and mimic slip. Our slipping diagnosis guide walks through the test, and shift flare vs slip helps separate a real slip from a momentary flare.

Fitment

Our listing is titled for the 2013-2014 Acura ILX. Clutch Masters' own application list for 08320-HRTZ-X covers the 2013-2015 ILX 2.4L six-speed on the factory ECU, the 2009-2014 Acura TSX 2.4L six-speed and the 2012-2015 Honda Civic Si 2.4L six-speed. It does not fit the ILX 2.0L or the hybrid.

The key detail is the flywheel. Clutch Masters builds every 08320 kit as a conversion: the stock ILX flywheel will not work with it, and the kit requires their FW-320-SF steel flywheel. That flywheel is kept at factory weight, which is why no FlashPro or other engine management is needed. The lighter 08240 kits are the ones that need a tune. If you would rather get the flywheel in the same box, look at the FX250 kit with steel flywheel or the FX400 6-puck kit with steel flywheel. Not sure which ILX you have? Send us the year and VIN and we will confirm before it ships.

Install notes

• Install the FW-320-SF flywheel with new bolts torqued to the factory spec in a cross pattern; do not reuse the OEM flywheel.
• Center the disc with the supplied alignment tool and draw the pressure plate bolts down evenly in a star pattern.
• Clean the input shaft splines and use a light film of high-temp grease; wipe off any excess.
• Bleed the clutch hydraulics with fresh DOT 3 brake fluid.
• Refill the gearbox with Honda MTF, and inspect the engine and transmission mounts while the car is apart; a worn mount set like our 2.4L mount kit causes driveline shudder that feels like clutch chatter.
• Follow the 500-mile break-in Clutch Masters requires: no launches or full-throttle shifts until it is done.

Budgeting the labor? Our manual transmission repair cost guide covers typical shop hours for a clutch job.

Does this kit include the flywheel?

No. 08320-HRTZ-X is the clutch only. Clutch Masters requires its FW-320-SF steel flywheel with every 08320 kit, and the stock ILX flywheel will not work with it.

Will I need a FlashPro or tune?

No. The 08320 platform uses a flywheel built to factory weight, so Clutch Masters says aftermarket engine management is not required. Only the lighter 08240 kits need a tune.

Does it fit a 2015 ILX or a Civic Si?

Clutch Masters lists the 2013-2015 ILX 2.4L six-speed, the 2009-2014 TSX 2.4L six-speed and the 2012-2015 Civic Si 2.4L. It does not fit the ILX 2.0L or hybrid.

Is the FX300 good for track days?

Clutch Masters rates it for street use, not track work. For regular track use or higher boost, the FX400 6-puck kits are the stronger option.

What fluid does it need after install?

Bleed the clutch hydraulics with fresh DOT 3 brake fluid and refill the gearbox with Honda MTF.

Is there a break-in period?

Yes. Clutch Masters requires at least 500 miles of normal driving before launches or hard shifts.

• Transmission Slipping Diagnosis Guide
• Shift Flare vs Slip: What Is the Difference
• Automatic vs Manual Transmission Repair Cost