Rear Diffuser

Wilhelm Raceworks rear diffuser

Sheet metal rear diffuser and transmission under panel for your MR2!  Based on the prototype I described in my blog, with some improvements and additions. Laser cut and CNC bent from a combination of .100in and .050in aluminum sheet.

Rear diffuser installed


This diffuser will NOT fit any existing MR2 exhaust other than my center exit Borla for 2GR swaps.  For non-2GR applications, a custom center exit exhaust will be required.  I can sell you just the muffler section from my exhaust, and a custom mid-pipe would need to be made to complete the system.

A version with the center section raised to the same level as the other four tunnels is also available, for those with alternate exhaust exits (such as between the tail lights).  Available only as part of a pre-order / group buy.  Please leave me a note in the order comments section if you want this option.

Installation will require drilling two holes in the rear cross member and installing rivnuts in those holes.  A half dozen holes in the rear bumper beam will also be required.  The diffuser will ship disassembled, and unfinished.  You may want to smooth the edges of the parts with sand paper and paint it, although it can also be left raw aluminum.   Assembly and installation will require a pop-rivet tool, and a rivnut puller.

Installation Instructions

SKU Rear Diffuser
Out of stock

Finished in black paint and installed.

Rear diffuser prototype installed Rear diffuser prototype installed

Rear diffuser prototype installed


  1. Saturday, 12 November 2022 19:18

    Hi , how long i can receive this item if i bought it and is it got black paint like picture installed on car ?? 

    1. Saturday, 12 November 2022 22:58

      I have two of them in stock at the moment, can ship immediately.  I don't do any finishing on them, that is up to you.

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