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The 100mm tips don't need any trimming of the valances
Performance Increase : 23-29hp
Installation is simple
faster shifting throughout
The secondary catalytic convertors are removed
Milltek Downpipe-back System - BMW X3M | X3M Comp (LCI) G81 The 100mm tips don't needOPF GPF Bypass System Requires OPF GPF Bypass Module or Stage 2 ECU Software Our range of Cat Back systems are perfectly suited to cater for anyone looking to improve their sound and aesthetics, designed as a direct replacement for the original system, available in multiple configurations enabling the owner to choose the increase in volume of their exhaust and or add a more suitably aggressive tone. All our products are made from 304L Aircraft Grade