BMW E46 M3 Exhaust SECTION 1 with GESI ultra high flow catalysts f98 your 328i should see a

your 328i should see a gain of roughly 15 horsepower and 12 lb

but configured by you to run without the catalysts for gains of additional horsepower

The stock S55 midpipe is a dual pipe system from each turbo that leads to the rear muffler

SIMON 4 BMW TUNING PROGRAMMER

BMW E46 M3 Exhaust SECTION 1 with GESI ultra high flow catalysts f98 your 328i should see aActive Autowerke BMW E46 M3 Exhaust SECTION 1 with GESI ultra high flow catalysts NO PERFORMANCE TUNE NEEDED. Combine the Active Autowerke Exhaust SECTION 1 with a pair of GESI G Sport catalysts and you have part of a winning combination for your BMW E46 M3. Design and Concept: Why create an exhaust SECTION 1 when the USA version BMW factory SECTION 1 already comes from the factory as a straight through design with two separate pipes and resonators