600140-03 is a flywheel kit for various Mazda RX-7 and RX-8 applications comes complete with an ACT counterweight. The flywheel counterweight is required when installing the XACT flywheel on various Mazda RX-7 and RX-8 rotary applications. XACT Prolite flywheels are ACT's lightest flywheel offering with lowest inertia. Prolite flywheels are designed for best throttle response and acceleration. Prolite flywheels are preferred for road racing or rally racing, and have reduced drivability. Materials are properly distributed for maximum strength, lower inertia, good heat tolerance and rigidity. XACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.
WarrantyThis Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008 | Mazda | RX-8 | 40th Anniversary Edition |
| 2004-2007 | Mazda | RX-8 | Base |
| 2008-2011 | Mazda | RX-8 | Grand Touring |
| 2009-2011 | Mazda | RX-8 | R3 |
| 2005 | Mazda | RX-8 | Shinka |
| 2008-2011 | Mazda | RX-8 | Sport |
| 2008-2009 | Mazda | RX-8 | Touring |
| Brand | ACT |
|---|---|
| Type | Flywheels |
| SKU | ACT600140-03 |
| Weight | 16.7 lb |
| Make | Mazda |
| Model | RX-8 |
| Mfr. Part # | 600140-03 |
| Flywheel type | Prolite |
| Material | Chromoly Steel |
| Friction surface diameter | 9.4 in (240 mm) |
| Ring gear teeth | 125 |
| Weight | 15.8 lb |
| SFI specification | SFI 1.1 |
| Recommended use | Recommended for all uses |
| Feel | Dramatically improved engine response and acceleration, mild to moderate gear rattle |
Fits 2004–2011 Mazda RX-8
Always confirm engine, transmission and chassis before ordering. Call us if you are unsure.
Shipping: Some items may qualify for free shipping with Local Pickup in store. All orders have a 2–3 business day processing time. Some orders may have extended shipping times based on current stock status — we'll confirm the lead time at order placement.
Returns: Accepted within 30 days of delivery for unused product in original packaging. Returns are subject to a 25% Restocking Fee. Special-order and custom-built items are final sale.
Warranty: All products carry the manufacturer's full warranty. Coverage is honored through PMD as your authorized dealer.
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