The HPF stainless steel exhaust system is one of the highest flowing exhaust systems for the BMW 135i with a massive 3.5" piping and no mufflers. Not only will you pick up power, but your car will weight 40 lbs less than it did with the factory exhaust. This exhaust system bolts directly to the factory cats or aftermarket downpipes. This exhaust system is capable of flowing well over 800rwhp. It is made with 100% USA polished stainless steel with a dual titanium tip. Think running without a muffler sounds loud? Check out the video below and see for yourself. There is zero drone with the rubber isolated mounts and the sound is exotic.
hpf 135i exhaust systems from horsepowerfreaks exhaust systems. Install and installation help available for parts and accessories for these model years.
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