We Test the BimmerWorld Exhaust and Epic Tune for S65 V8 M3


Here’s a close up of the first and second iterations of BW’s X pipes.

Finally, BW decided to release a fourth iteration, which we got (we didn’t get version 3.0). Version 4.0 places the X pipe closer to the headers (bottom).

Says BM owner James Clay, “the crossover X in the final version is moved further forward about 8 inches. It makes about 10 lb-ft more at 3500 RPM or so, and should be the highest output of any X-pipe on the market.”


In this close-up, you can see just how far forward version 4.0 is, and something like this takes a whole new fabrication of the piping connecting this to the headers. But that’s what the people at BW are willing to do to get the most out of their products. “We made this part and accepted nothing, but what we knew was the best, based on our race program, and we refused to compromise to make it easier or cheaper to produce,” says James Clay.

BimmerWorld’s version 2.0 racing X-pipe setup (left) vs version 4.0 (right), which we will be testing against stock. Version 2.0 went to a friend’s M3 in Fayetteville, Arkansas, near the Univsersity of Arkansas. Razorbacks suck.

Here’s a view of all the included parts we’ll be testing in this final, version 4.0 of BimmerWorld’s racing X-pipe and Epic Motorsports software. The entire setup runs about $2k. Testing will take place at MKC.


  1. I’m investigating issues where the E92 M3 with Bimmerworld resonated X-Pipe has a torque dip/hesitation/bog under light-moderate acceleration around 2500 RPM. Did you encounter this with your vehicle either before or after the tune?

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