Used Mazda RX-8 Exhaust Manifold

Yes, all Mazda RX-8s have an exhaust manifold — but because the RX-8 uses a Wankel rotary engine (the Renesis 13B-MSP) rather than a conventional piston engine, its exhaust manifold is a rotary-specific component and is not interchangeable with manifolds from any conventional petrol or diesel engine. This makes sourcing a used one particularly important to get right, as there is no conventional alternative that will fit.

The RX-8 ran from 2003 to 2012, with a significant facelift in 2008 that brought a revised Renesis engine producing 232 PS and updated emissions equipment, replacing the earlier 192 PS and 231 PS variants. While both generations share the same 13B-MSP rotary engine family, the exhaust routing and manifold design can differ between pre- and post-facelift cars, so you should not assume a manifold from a 2004 car will bolt straight onto a 2009 car without confirming with the breaker against your specific registration.

Trim level — whether that is the standard RX-8, the Sport, the PZ or the R3 special edition — does not affect which exhaust manifold is fitted, as fitment is determined by the engine specification and model year rather than trim. All RX-8 variants used the same 13B-MSP Renesis rotary engine, so you do not need to source a manifold from the same trim your car is; confirm the model year and engine code with the breaker instead.

The RX-8 was sold exclusively with the 13B-MSP Renesis rotary engine throughout its UK production run, so there is only one engine type to contend with. However, power outputs changed across the model's life — the early cars offered 192 PS and 231 PS versions, while the post-2008 facelift car produced 232 PS — and these differences may be reflected in the exhaust manifold specification, so always quote your engine code and registration to the breaker when requesting a part.

The RX-8's rotary engine meant it had to meet emissions standards in a particular way, and the catalytic converter arrangement is closely tied to the exhaust manifold on these cars. Whether a manifold-and-cat assembly from another year will pass your MOT or physically interchange is something you must confirm directly with the breaker against your registration, as this is strong confirm-with-breaker territory and we would not want to advise you incorrectly on an MOT-critical item.

Because the RX-8 is a low-volume rotary-engined car, used exhaust manifolds are less common than for mainstream petrol models, so it is worth contacting several breakers and being prepared to wait. When you request quotes, give your full registration, model year, and confirm whether your car is the pre-2008 or post-2008 facelift, as this will help breakers identify the correct part and avoid supplying something from the wrong specification.