Clutch Masters 12-13 Honda Civic Si 2.4L 6spd FX400 High Rev 6-Puck Ceramic Clutch Kit w/ Steel FW
The Clutch Masters 08240-HRC6-SK is a six-puck ceramic clutch kit with a steel flywheel for the 2012 to 2013 Honda Civic Si with the K24 2.4L and six-speed manual. It is built for Si owners who have pushed past what a stock or street organic clutch can hold: boosted cars, built K24s, drag launches and road course use where the old disc flares on every hard upshift. If your tuned Si slips in third and fourth at full throttle or you are planning forced induction, this is the kind of clutch that holds it.
Clutch Masters rates the FX400 at a 170 percent increase in holding capacity over stock and labels it race and street. The kit pairs the Power Plus I high-leverage heavy-duty pressure plate with a sprung ceramic button disc. The sprung hub takes some of the shock out of the driveline, which makes it more livable than a rigid disc, but the six pucks have no Marcel cushion between the linings. Clutch Masters warns that this design engages quickly and may chatter slightly in first and reverse. In plain terms, it bites hard and fast, and you will feel it in parking lots.
The flywheel matters as much as the disc. Every 08240 kit is a conversion kit meant to run on the lighter-than-OEM Clutch Masters steel flywheel, which Clutch Masters lists as FW-037-SF for the 08240 series. Because that flywheel is lighter than the factory part, Clutch Masters says a Hondata FlashPro or other engine management is required, or the car will set a check engine light. The stock Si flywheel will not work with this clutch. This SK kit ships with the steel flywheel so the clutch and flywheel are matched out of the box.
A roll-on test tells you most of what you need. In fourth gear from about 2,500 rpm, go to wide-open throttle and watch for the tach jumping ahead of road speed. Then rule out problems a new clutch will not fix: a soft or sinking pedal points at the master or slave cylinder, and a wet bellhousing means a rear main seal or input seal leak that will ruin the new disc. Our slipping diagnosis guide covers separating clutch slip from other drivetrain faults. If your Si is stock or close to it, a ceramic puck clutch is the wrong choice; Clutch Masters itself says ceramic discs are never recommended for stock or near-stock cars, and the FX300 sprung kit with steel flywheel is the better street choice.
Our listing covers the 2012 to 2013 Civic Si 2.4L six-speed. Clutch Masters application data for the 08240-HRC6 FX400 also lists the 2012 to 2015 Civic Si 2.4L six-speed, the 2009 to 2014 Acura TSX 2.4L six-speed and the 2013 to 2015 Acura ILX 2.4L six-speed. Two things to check before ordering. First, you must be able to tune the car, because the 08240 flywheel is lighter than OEM. If you want to stay on the factory ECU, choose an 08320 kit such as the FX400 6-puck kit with the OEM-weight steel flywheel. Second, if your car already has a lightweight flywheel or another conversion, tell us what is in it. Send your year and VIN for a fitment check, or browse other options in our rebuild kits category.
| Brand | Clutch Masters |
| Part number | 08240-HRC6-SK |
| Fits | Clutch Masters 12-13 Honda Civic Si 2.4L 6spd FX400 High Rev 6-Puck Ceramic Clutch Kit w/ Steel FW |
| 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 |
Yes. Clutch Masters says all 08240 kits use a flywheel that is lighter than OEM and need a FlashPro or other engine management, or the car will set a check engine light. If you want to keep the factory ECU, use an 08320 kit.
It can. The six-puck ceramic disc has no Marcel cushion, and Clutch Masters warns it engages quickly and may chatter slightly in first and reverse. The sprung hub helps, but it will never feel like a stock organic clutch.
No. Clutch Masters states the stock OEM flywheel will not work with its K24 clutch kits. This SK version includes the steel flywheel, so you do not need to buy it separately.
No. Clutch Masters says ceramic discs are never recommended for stock or near-stock cars, and street use on a ceramic disc can shorten its life. An organic or Kevlar kit like the FX300 suits a lightly modified daily driver better.
Our listing is titled 2012 to 2013, but Clutch Masters lists the 08240-HRC6 for 2012 to 2015 Civic Si 2.4L six-speed, 2009 to 2014 TSX and 2013 to 2015 ILX. Send your VIN if you want us to confirm.
