Spec 03-10 Mazdaspeed3 2.3L Stage 2+ Clutch Kit (Non Self-Ratcheting & MUST be used w/ FW SZ03A-2)
SPEC SZ033H-2 is the Stage 2+ single disc clutch kit for the Mazdaspeed3 with the 2.3L turbocharged engine, also listed by SPEC for the Mazdaspeed6. It is built for a tuned Mazdaspeed that has outgrown the factory clutch: slipping in third and fourth when boost comes in, a high engagement point, or a burnt smell after a few hard pulls. One condition matters more than anything else on this page: it is a non-ratcheting kit that SPEC lists for use only with the SPEC billet flywheel.
The Mazdaspeed engine makes its torque early and in a hurry once the turbo spools, and a tune, intake and downpipe push it well past what the original clutch was sized for. A clutch slips when engine torque exceeds what the clamp load and disc friction can hold. SPEC rates SZ033H-2 at 545 ft-lb of torque capacity, which gives a modified car real margin.
SPEC builds this kit in a non-ratcheting (non self-adjusting) form and pairs it with its own billet flywheel. The listing title says it plainly: it must be used with flywheel SZ03A-2. SPEC lists the matching SZ03A-2 aluminum flywheel for the same Mazdaspeed3 and Mazdaspeed6 applications, at 12 lb. Do not plan to bolt this clutch to the factory flywheel or to a flywheel from another brand. Budget for both parts together.
Log a pull in fourth gear from low rpm to redline and compare engine rpm to vehicle speed: if rpm jumps while speed lags as boost peaks, the clutch is slipping. Before you order, rule out the hydraulics, because old fluid or a tired slave cylinder can change engagement. Check the bellhousing seam for oil from the rear main seal, which will ruin a new disc. Our slipping diagnosis guide covers the test, and manual vs automatic repair cost helps you budget the clutch, flywheel and labor.
Our listing title reads 2003-2010 Mazdaspeed3 2.3L, and the SPEC catalog lists the kit under Mazda 3 Mazdaspeed (2003-2013) and Mazda 6 Mazdaspeed (2006-2013), with the note that it is for use only with the SPEC billet flywheel. The turbocharged Mazdaspeed3 itself was sold in North America from 2007 through 2013, so the earlier catalog years do not describe a separate model. This kit is for the turbo Mazdaspeed engine, not the naturally aspirated Mazda3. Because the year ranges in different catalogs disagree, send us your year and VIN before ordering and we will confirm it. If you would rather not change the flywheel, compare the ACT XT street kit for the Mazdaspeed3 and check its own flywheel requirements.
| Brand | SPEC |
| Part number | SZ033H-2 |
| Fits | Spec 03-10 Mazdaspeed3 2.3L Stage 2+ Clutch Kit (Non Self-Ratcheting & MUST be used w/ FW SZ03A-2) |
| Vehicle fitment | Mazda Mazdaspeed3 (2003-2010) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. SPEC lists this non-ratcheting kit for use only with the SPEC billet flywheel, and the listing names SZ03A-2 as the required flywheel.
SPEC rates SZ033H-2 at 545 ft-lb of torque capacity.
SPEC lists it for the Mazda 6 Mazdaspeed as well as the Mazdaspeed3. Send us the year and VIN and we will confirm before it ships.
No. It is listed for the turbocharged Mazdaspeed models only.
The SZ03A-2 flywheel is required. While the transmission is out, check the rear main seal and the clutch hydraulics, and refill with fresh brake fluid.
