Active Autowerke E9X M3 GESI Ultra High Flow Cats Upgrade for Signature X Pipe 745 year-2015-make-bmw-model-135i

year-2015-make-bmw-model-135i

the factory down pipe in the B46 and B48 is quite restrictive

Designed to be used at stock power levels along with highly modified engines

Dimensions and cutting measurements are included in the instructions

and you can fax it to us at (305) 253-8921***

Active Autowerke E9X M3 GESI Ultra High Flow Cats Upgrade for Signature X Pipe 745 year-2015-make-bmw-model-135iNO PERFORMANCE TUNE NEEDED. Active Autowerke is proud to release the highly anticipated GESI G Sport cats upgrade Connecting Pipes to the Signature Track Pipe with X Pipe for the BMW E9X M3. This is intended for those discriminating car owners who already have an Active Autowerke Signature Track Pipe and would like to remove the CEL without using a tune while meeting emission requirements as specified by the EPA. This exhaust system was designed and