Spec 03-10 Mazdaspeed3 Aluminum Flywheel (Non Self-Ratcheting)
SPEC SZ03A-2 is the 12 lb billet aluminum flywheel for the turbocharged Mazdaspeed3 and Mazdaspeed6, built to run with SPEC's non-ratcheting (non self-adjusting) clutch kits. Owners come to it when the factory dual mass flywheel starts rattling at idle or chattering on takeoff, when a tuned car needs a SPEC Stage 2+ or higher clutch, or when they want the 2.3L turbo engine to rev and settle faster between shifts.
The Mazdaspeed cars left the factory with a dual mass flywheel, which uses internal springs to soak up driveline vibration. Those springs and bearings wear out, and many performance clutches are not designed around them. SZ03A-2 replaces it with a solid billet aluminum flywheel carrying a replaceable steel friction plate; SPEC notes the friction plate and fasteners come installed on the flywheel and can be renewed later instead of machining the whole part. Less rotating mass lets the engine pick up and drop rpm quicker, and the single mass design removes the dual mass wear item altogether. Expect a little more gear rattle at idle and slightly more throttle needed leaving a stop, which our lightweight vs stock flywheel guide explains.
The -2 suffix matters. SPEC builds a separate SZ03A for its ratcheting clutches that work with the original clutch pattern. SZ03A-2 is only for the non-ratcheting family, and those kits are only for use with a SPEC billet flywheel, so the clutch and flywheel are chosen as a pair.
A failing dual mass usually shows itself as idle rattle and takeoff judder; slip shows as rpm rising faster than road speed in fourth gear at full boost. Check the clutch hydraulics and the rear main seal before blaming either part. Our slipping diagnosis guide covers the road test and clutch chatter on takeoff covers judder causes. To budget the clutch, flywheel and labor together, see manual vs automatic repair cost.
SPEC lists SZ03A-2 for the Mazda 3 Mazdaspeed (2003-2013) and Mazda 6 Mazdaspeed (2006-2013) with non-ratcheting clutches, for use only with the SPEC billet flywheel. Our listing reads 2003-2010 Mazdaspeed3. The turbocharged Mazdaspeed3 itself was sold from 2007 to 2013, so the early catalog years do not describe a separate car. It does not fit the naturally aspirated Mazda3. Match it to a SPEC non-ratcheting kit: SPEC's chart lists Stage 1 SZ031-2 through Stage 5 SZ035-2, including the SZ033H-2 Stage 2+ kit we carry. Send your year and VIN and we will confirm the combination.
| Brand | SPEC |
| Part number | SZ03A-2 |
| Fits | Spec 03-10 Mazdaspeed3 Aluminum Flywheel (Non Self-Ratcheting) |
| Vehicle fitment | Mazda Mazdaspeed3 (2003-2010) |
| Type | Flywheels |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. SPEC lists it for non-ratcheting SPEC clutches only. For a ratcheting clutch on the original pattern, SPEC makes a different flywheel, SZ03A.
SPEC's non-ratcheting Mazdaspeed kits, Stage 1 SZ031-2 through Stage 5 SZ035-2. We carry the SZ033H-2 Stage 2+ kit.
SPEC lists SZ03A-2 at 12 lb, a single mass billet aluminum flywheel.
SPEC lists it for the Mazda 6 Mazdaspeed with non-ratcheting clutches. Send us your year and VIN to confirm.
Yes. SPEC sells a replacement billet aluminum flywheel friction plate with fasteners; one comes installed on the flywheel.
