De-cat Downpipe Bmw S63 Engine (m5/m6)

AIRTEC Motorsport De-Cat Downpipe for BMW S63B44TU engine (M5/M6) By removing the original & restrictive catalytic converter in the OEM factory downpipe, back pressure us hugely reduced, in return means a faster spool, increased power and a much more aggressive exhaust note. One of the only manufacturers that offer a cast elbow to retain diameter!

Smooth bends to ensure increased flow. Fits original and aftermarket exhaust systems. Improved performance further enhanced with remap.

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