Clutch Masters 17-18 Honda Civic Type-R 2.0L Turbo Steel Flywheel

The Clutch Masters FW-520-SF is a steel flywheel for the FK8 Honda Civic Type R with the 2.0 L turbo and six-speed manual. Type R owners usually land here at clutch time: the factory flywheel is heat-checked or grooved after hard launches and track days, a new disc judders on takeoff, or the car is getting an upgraded clutch and the owner wants a fresh, balanced friction surface to go with it.

What the flywheel does in an FK8 Civic Type R

The flywheel bolts to the back of the K20C1 crankshaft. It carries the starter ring gear, gives the clutch disc a flat surface to clamp against, and its mass helps the engine idle and pull away smoothly. Honda already fitted the FK8 with a lightweight single-mass flywheel to cut clutch inertia and sharpen throttle response, so this is not a dual-mass conversion. The FW-520-SF is a direct single-mass replacement that Clutch Masters builds to OE specifications. It is CNC machined from a 1045 steel billet core, zero balanced, black oxide coated against rust and SFI 1.2 certified for motorsport use. Steel holds up to repeated heat cycles from launches and rev-matched downshifts better than an aluminum friction face, which is why many track-day owners choose it.

Symptoms that point to the flywheel

• Judder or shudder pulling away, even after a new clutch disc
• Blue or dark hot spots, cracks or a glazed ring on the friction face
• Slip and burning smell that came back soon after the last clutch job
• Vibration that rises with engine speed
• Grinding or missed engagement when the starter turns, from worn ring gear teeth

How to confirm before you buy

A worn clutch or flywheel does not set a trouble code, so it takes a road test and an inspection. Make a steady pull in fourth gear from low rpm. If the tach climbs faster than road speed, something is slipping; our clutch slipping guide and the slipping diagnosis guide walk through it. Judder on takeoff is covered in clutch chatter causes. Once the transmission is out, look for heat cracks and measure the face. The resurface versus replace guide explains when machining the stock part still makes sense.

Fitment

Our listing names the 2017-2018 Honda Civic Type R. Clutch Masters lists the FW-520-SF more broadly for the 2017-2021 Civic Type R 2.0 L turbo (FK8). It is not listed for the 2023-up FL5 Type R, the 1.5 L turbo Civic or the Si, which use different flywheels. If you are unsure, send us your year and VIN and we will confirm before it ships. Other Type R clutch parts are in our clutch and rebuild kits section.

Install notes

• Clutch Masters says the flywheel works with the factory clutch or any of its FX100-FX500 single-disc kits. The FX250 Type R kit suits a street car with a tune; the FX350 kit is for more power.
• Clean the friction face with brake cleaner before the disc goes on, and keep grease off both faces.
• Use new flywheel bolts and tighten them in a crossing pattern to the Honda service manual torque.
• Check the pilot bearing while you are in there; an OEM Tools pilot bearing puller makes it a quick job.
• Center the disc with an alignment tool, refill the gearbox with Honda MTF and bleed the clutch hydraulics with fresh DOT 3 brake fluid.
• Break in the new clutch gently before launches; see how to break in a new clutch.

Does the FW-520-SF fit a 2019-2021 Civic Type R?

Clutch Masters lists it for the 2017-2021 Civic Type R 2.0 L turbo (FK8). Our listing is titled 2017-2018, so send us your year and VIN and we will confirm a later car before it ships.

Will it fit the 2023 and newer FL5 Type R?

It is not listed for the FL5. Clutch Masters lists this part for the FK8 only, so match it to an FK8 car.

Can I run my stock Type R clutch with it?

Yes. Clutch Masters builds it to OE specifications for the factory clutch or its FX100-FX500 single-disc kits.

Is the stock FK8 flywheel dual-mass?

No. Honda says the Type R uses a lightweight single-mass flywheel to cut clutch inertia, so this is a like-for-like single-mass replacement, not a conversion.

Why steel instead of aluminum?

A steel friction face handles repeated heat from launches and track sessions well, and it does not need a replaceable insert. Clutch Masters also SFI 1.2 certifies its flywheels for motorsport use.

What else should I replace with it?

Usually the clutch kit, the pilot bearing, the flywheel bolts and the transmission fluid. Bleed the clutch hydraulics after the job.

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