RTM-RD-V1-BLACK-89-91 - R Theory Motorsports rear diffusers

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Part #: RTM-RD-V1-BLACK-89-91
Your Price: $327.00

All Fitments

Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes

Product Description

R Theory Motorsports rear diffusers make the rear of your Miata look amazing while giving it an aerodynamic edge.

It is constructed out of Aluminum weighing only nine pounds, but is strong and sturdy. All the parts are black powder coated for a durable and beautiful looking finish. Everything is 100% chassis mounted, no drilling or cutting is needed to make it fit. Gradient angle and length sticking out past the bumper are adjustable.

VERSION 1 vs. VERSION 2: The differences on the Version 2 are:

- Wider design — from outer edges of wheel to wheel.
- Center section is arched. Arched diffusers provide better air attachment and downforce compared to single-angle diffusers.
- Better muffler clearance than the Version 1, though it’s likely you will have to trim this diffuser to clear your exhaust tip. With so many exhaust tip styles out there, we decided it would be better if you trimmed the exhaust tip clearance yourself to achieve the best possible fitment.

TOW HOOK CLEARANCE: It is recommended that NA owners remove one or both OEM tow hooks for better fitment. NB owners will need to cut out the pre-cut rectangle on the diffuser to clear the OEM tow hooks.

EXHAUST CLEARANCE: As long as your aftermarket exhaust routes the same way as the OEM exhaust and the exhaust tip is roughly in the same location as OEM, the diffuser should clear it. The diffuser is designed to fit between the tips of most dual outlet exhaust systems.

PRICE DIFFERENCE BETWEEN 1989-1991 vs. 1992-2005 KITS: 1989-1991 kits are more expensive because they include additional brackets to simulate the 1992-2005 subframe that comes from the factory with threaded tabs need for the diffuser to attach to.