Clutch Masters Lightweight Steel Flywheel for 12-15 Civic Si

Clutch Masters Steel Flywheel FW-320-SF - 2012-2015 Honda Civic Si & Acura 2.4L

Hearing a rattle from your bellhousing at idle that goes away when you push the clutch in? That's your dual-mass flywheel telling you it's on the way out. Honda put a heavy dual-mass unit on these cars, and it's got springs inside that wear out and start clattering, and replacing it with another one is expensive. This Clutch Masters FW-320-SF steel flywheel is the better answer. It's a solid, one-piece steel flywheel that ditches all that dual-mass complexity for good, and because it's matched to factory weight, it runs on your stock ECU with no tune at all.

Why Ditching The Dual Mass Is An Upgrade

Here's what you're getting rid of. A dual-mass flywheel is basically two pieces with springs and dampers packed between them, and Honda used it to smooth out driveline noise. Problem is, all those internal parts are wear items. They fatigue, they rattle, they eventually fail, and when they do you're pulling the transmission and buying another pricey dual-mass unit to do it all again. A solid steel flywheel has nothing inside to break. It's one piece of steel, so it just doesn't fail the way a dual-mass does. That's why the conversion is the standard move on these cars once the factory unit gives up, or once you're putting a real clutch in and want a fresh, dependable surface behind it.

No Tune Required. Seriously.

This is the part that makes the FW-320-SF the easy choice. It's matched to OEM weight, which means your ECU never notices anything changed. No Hondata FlashPro, no engine management, no check engine light to chase around. That's a real difference from the lightweight FW-037-SF, which is lighter than factory and will absolutely set a code unless the car's properly tuned. If you'd rather not add a tuner to the bill just to run a clutch, this is your flywheel. Bolt it up, run your factory ECU, drive the car.

Important: This Only Works With Clutch Masters Clutches

Read this before you order, because it's the one that'll burn you. This is a conversion flywheel, and it's built specifically for Clutch Masters clutch kits. It will not work with your OE clutch, and it won't work with another brand's aftermarket kit either. So it needs to go in with a Clutch Masters single disc kit, anything in the FX100 through FX500 range. If you're doing the 08320 FX100 clutch, this FW-320-SF is precisely the flywheel that kit calls for, so grab them together and you've got a matched setup.

Fresh Surface, Solid Steel

Since you've got the transmission out anyway, this is the right time. A flywheel is a wear surface, and if yours is glazed, heat-checked, or scored from an old slipping clutch, your new clutch won't bed properly and you'll be fighting engagement problems from day one. Putting a fresh steel flywheel in behind a fresh clutch means both parts start clean, and steel takes heat and abuse well, so it holds up.

What You Get

• Clutch Masters FW-320-SF steel flywheel
• Replaces the factory dual-mass flywheel with a solid, one-piece steel unit
• Matched to OEM weight, so no tune or engine management is required
• Works with your factory ECU
• Conversion flywheel for Clutch Masters single disc FX100 through FX500 clutch kits
• Not compatible with OE clutches or other aftermarket clutch kits
• The correct flywheel for the FX100 08320 clutch kit

Fits These Cars

• 2012-2015 Honda Civic Si (K24Z7, 6-speed manual)
• 2009-2014 Acura TSX (2.4L, 6-speed manual)
• 2013-2014 Acura ILX (2.4L, 6-speed manual, OEM ECU)

Note: Clutch Masters FW-320-SF steel flywheel for Honda and Acura 2.4L applications with a 6-speed manual transmission, including the 2012-2015 Honda Civic Si, 2009-2014 Acura TSX, and 2013-2014 Acura ILX. This is a single-mass steel flywheel that replaces the factory dual-mass flywheel, eliminating the internal springs and dampers that wear out over time. It is matched to OEM weight, so it runs on the factory ECU and does not require a Hondata FlashPro or other aftermarket engine management. This is a conversion flywheel and must be used with a Clutch Masters single disc clutch kit (FX100 through FX500); it is not compatible with OE clutches or other aftermarket clutch kits. It is the required flywheel for the FX100 08320 clutch kit. One flywheel per order.