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Challenge Engineering - E9X M3 Exhaust System
The Challenge Engineering Exhaust system features 304 stainless steel piping and flanges, and a precision fabricated muffler section. This is a full bolt on solution that connects directly to the OEM Midpipe flange. All bolts, gaskets, and stainless clamps necessary for install are included. ECU reflash or CEL not required.
3.5 Inch Round Tips
Made in the USA
Full stainless steel construction
Laser cut and formed mounting brackets
2.5 inch Piping
Full bolt on installation
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