Clutch Masters 12-13 Honda Civic Si 2.4L 6spd FX100 High Rev Sprung Clutch Kit w/ FW *OEM ECU*
If the clutch in your 2012-2013 Honda Civic Si 2.4L six-speed has started to slip in third and fourth when the K24 comes up on VTEC, or the pedal now engages near the top of its travel, this Clutch Masters FX100 kit (08320-HR00-SK) is the mild street upgrade for that car. It is built for a Si that is still on the factory engine computer: the kit ships with the OEM-weight steel flywheel it needs, so there is no tune to buy and no check engine light to chase after the swap.
The clutch is the only link between the K24 crank and the six-speed input shaft. A diaphragm pressure plate bolted to the flywheel squeezes the disc, and when you press the pedal the hydraulic slave pushes the release bearing into the diaphragm fingers to let go. The FX100 uses the Clutch Masters Power Plus I heavy-duty pressure plate with a steel-backed organic disc on a Marcel spring wafer. Clutch Masters rates it at 70 percent more holding capacity than stock and aims it at cars with intake, exhaust and similar bolt-ons, or up to a 50 hp shot of nitrous. Pedal effort goes up only slightly, and engagement feels like a fresh factory clutch rather than a race part, which is why it suits a daily-driven Si.
The important detail on this platform is the flywheel. Clutch Masters builds every K24 kit as a conversion, and the factory flywheel will not work with any of them. Kits beginning with 08320 use the FW-320-SF steel flywheel, machined to OEM weight so the factory ECU stays happy. Kits beginning with 08240 use a lighter flywheel and need a FlashPro or other engine management, or the car will set a check engine light. The -SK suffix on this listing means the FW-320-SF flywheel is included.
Do a simple load test: in fourth gear around 2,000 rpm, roll into full throttle and watch the tachometer. If rpm jumps ahead of road speed, the disc is slipping. Before you buy, bleed the clutch hydraulics and check for a soft pedal or a leaking slave, because air or a failing slave can mimic a worn disc. Our transmission slipping diagnosis guide walks through separating clutch slip from other drivetrain faults, and the manual vs automatic repair cost breakdown shows what a clutch job should cost against other repairs.
This listing covers the 2012-2013 Honda Civic Si with the 2.4L engine and six-speed manual. The Clutch Masters application chart for 08320-HR00 also lists the 2012-2015 Civic Si, 2009-2014 Acura TSX 2.4L six-speed and 2013-2015 Acura ILX 2.4L six-speed on the OEM ECU. It does not fit the 2.0L Si, the automatic cars or the 2016-and-later Civic. If your car has a swapped engine, a tune or anything other than a factory 2.4L six-speed, send us the year and VIN before ordering. You can browse the rest of our clutch and rebuild parts in the rebuild kits collection.
Worn engine and transmission mounts on this chassis make a new clutch feel grabby and cause wheel hop, so many owners replace them during the same job with this 2012-2015 Civic Si mount kit. If you plan more power later, the FX300 kit for the same car also runs on the OEM ECU and holds noticeably more torque.
| Brand | Clutch Masters |
| Part number | 08320-HR00-SK |
| Fits | Clutch Masters 12-13 Honda Civic Si 2.4L 6spd FX100 High Rev Sprung Clutch Kit w/ FW *OEM ECU* |
| Vehicle fitment | Honda Civic Si (2012-2013) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. The 08320 kits use the FW-320-SF steel flywheel, which is made to OEM weight, so Clutch Masters states aftermarket engine management is not required. The lighter 08240 kits are the ones that need a FlashPro.
No. Clutch Masters builds its K24 kits as conversions and says the stock flywheel will not work with them. This -SK kit includes the FW-320-SF flywheel, so you have everything for the friction side of the job.
Our listing is for 2012-2013, but the Clutch Masters chart for 08320-HR00 lists the 2012-2015 Civic Si 2.4L six-speed. Send us your year and VIN and we will confirm before you order.
Clutch Masters rates it at 70 percent more holding capacity than stock and recommends it for bolt-ons or up to 50 hp of nitrous on a naturally aspirated car. For a turbo or supercharger build, step up to a higher-stage kit.
The kit includes the disc, pressure plate, flywheel, release bearing, pilot bearing when applicable and an alignment tool. While the transmission is out, check the slave cylinder, fork pivot, rear main seal and engine mounts.
Yes. Drive normally for the first few hundred miles with no launches or full-throttle shifts so the disc and flywheel surfaces bed in evenly.
