Upgrade the stock N20 downpipe to the MAD N20 4" Catless Downpipe for maximum airflow, power and sound. Removing the factory cat eliminates backpressure so the turbo spools faster and makes more power — with a much better note. The flex section reduces stress and vibration from heat and engine movement.

Expect up to a 30 HP increase on a tuned N20 with the stock turbo, and more on an upgraded turbo.

Features

• Large 4" catless design for maximum flow.
• Smooth bends for maximum airflow with no drone, plus a flex section.
• Lifetime warranty on defects and fitment; 90-day return; ships in 1–2 business days.

Fitment (N20 engines only)

• 2014–2016 BMW 228i
• 2012–2015 BMW 328i & xDrive (F-chassis)
• 2014–2016 BMW 428i & xDrive
• 2012–2016 BMW F10 528 & xDrive

If the downpipe doesn't clear the stock bracket, remove the stock bracket.

Emissions disclaimer: This product is not legal for sale or use on pollution-controlled vehicles operated on public roads and is intended for off-road, race, or closed-course competition use only. You are responsible for compliance with all applicable emissions laws; use on public roads may violate the Federal Clean Air Act (42 U.S.C. § 7522) and similar state laws. Please check your local laws before purchase and installation.

Ships from our Vancouver shop — KORE SPEED is proudly Canadian-owned, with no surprise cross-border duties for Canadian buyers. Questions on fitment? Email support@korespeed.com.