
BMW E Chassis N55 MAD Downpipe 135 335
Pairs well with
By removing the stock catalytic converter, you delete all turbo restrictions allowing your turbo (stock or aftermarket) to spool faster and achieve maximum power. Expect up to 30 HP increase on a stock car with a tune, even more with an upgraded turbo.
Features:
- Compatible with right hand drive and left hand drive vehicles
- Smooth bends for maximum airflow without any drone
- Up to 30HP increase on stock turbo, even more on upgraded turbo
- Gaskets and mounting included
- Lifetime warranty on defects and fitment
- 20 day return period
- Spot on fitment
Fitment:
- 2011-2013 BMW 135
- 2011-2013 BMW E chassis 335i & 335XI
- 2012-2015 BMW X1 35i

BMW E Chassis N55 MAD Downpipe 135 335
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About Us
Cen-Cal Motorsport isn’t just a parts shop—it’s a lifestyle for BMW enthusiasts who crave performance, precision, and style. We’re all about taking your BMW to the next level with premium parts that bring out the beast under the hood while keeping its luxury vibes on point.
Your BMW isn’t just a car—it’s an experience. Whether you're upgrading for speed, handling, or simply flexing on the road, we’ve got the gear to match your passion.
Why settle for stock? Explore our lineup and see how real quality transforms the drive. Got questions? Hit us up anytime—your ride deserves nothing but the best.