Clutch Masters 14-19 Mazda3 2.5L Aluminum Flywheel
The Clutch Masters FW-775-AL is a lightweight aluminum flywheel for the third-generation Mazda3 with the 2.5L engine and six-speed manual. Buyers are usually Mazda3 s owners who are replacing a worn clutch, find the factory flywheel scored or heat-checked, or want the 2.5L to rev up and drop between shifts more quickly for spirited street driving and autocross. It is built for a car that is moving to a Clutch Masters single-mass setup, so plan the flywheel and clutch kit as one purchase.
A flywheel bolts to the crankshaft, carries the ring gear the starter engages and provides the friction surface the clutch disc clamps against. Its weight acts like a reservoir of rotating energy. That helps the car pull away smoothly, but it also makes the engine slower to change speed. The 2.5L SkyActiv four is a naturally aspirated engine that likes to rev, and cutting flywheel mass is one of the few changes that a driver feels on every shift: rev-matched downshifts come up quicker and revs fall faster on upshifts. Clutch Masters lists a 12.5 lb shipping weight for this part with its box, so the bare flywheel weighs less than that.
Most flywheel problems show up as clutch problems. Warm the engine, select fourth gear near 2,000 rpm and apply full throttle on a safe road; a tach that climbs ahead of speed means the disc is slipping. Our slipping diagnosis guide explains the test, and our lightweight vs stock flywheel guide covers what changes on the street when you go lighter. A pedal that stays down or a clutch that drags is often hydraulic, so check fluid and the slave cylinder first.
Clutch Masters lists FW-775-AL for the 2014-2018 Mazda3 with the 2.5L engine and six-speed manual. Our listing title reads 2014-2019; the 2019 Mazda3 is a new generation that Clutch Masters does not list for this part, so a 2019 owner should send us the VIN before ordering. It does not fit the 2.0L Mazda3, automatic cars, or the earlier 2004-2013 Mazda3 and Mazdaspeed3. Clutch Masters notes that its sprung Mazda3 2.5L kits work only with a single-mass flywheel, which is what this is; pair it with the FX250 sprung kit 10775-HD0F-D for street use or the FX350 kit for harder use. Find more drivetrain parts in our rebuild kits category.
Fit the flywheel while the transmission is out for the clutch job. Clean the crankshaft flange and bolt threads, and replace the rear main seal if it shows any oil; a weeping seal will contaminate the new disc within weeks. Use new flywheel bolts with the thread locker and torque from the Clutch Masters instructions, tightening in a cross pattern. Clean the friction face with brake cleaner, center the disc with an alignment tool such as the Powerbuilt 8-piece pilot tool set, and tighten the pressure plate evenly. Bleed the clutch with the brake fluid named on the reservoir cap and follow the Clutch Masters break-in before hard driving. An aluminum flywheel needs a little more throttle on takeoff and can add gear rattle at idle.
| Brand | Clutch Masters |
| Part number | FW-775-AL |
| Fits | Clutch Masters 14-19 Mazda3 2.5L Aluminum Flywheel |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters lists it for 2014-2018 Mazda3 2.5L six-speed models. The 2019 is a new generation, so send us the VIN before ordering for a 2019.
No. It is listed only for the 2.5L engine with the six-speed manual in the 2014-2018 Mazda3.
A Clutch Masters single-disc kit built for a single-mass flywheel, such as the FX250 sprung kit 10775-HD0F-D or the FX350 kit for this car.
Clutch Masters lists a 12.5 lb shipping weight including the box; the flywheel itself is lighter.
It works, but takeoffs need slightly more throttle and idle gear rattle can increase. Drivers who want the quickest rev response accept that trade.
The clutch kit, flywheel bolts, the rear main seal if it leaks, and a fresh bleed of the clutch hydraulics.
