Active Autowerke BMW B58 F2X F3X M240i 340i 440i Catless Downpipe

Original price was: $399.00.Current price is: $379.00.

  • Designed to be as unrestrictive as possible
  • Casted upper V-Band for precise fitment
  • 4.50″ diameter piping allows for maximum power output
  • Quicker turbo spool
  • Easily bolts-on – no cutting or welding required
  • Durable construction from TIG welded 304 stainless steel
  • Precise fitment
  • Made in Miami, Florida

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SKU: 11-061-1 Category:

BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the later F-Chassis models beginning in 2016. The Active Autowerke B58 downpipe for the M240i, 340i and 440i helps unleash some of the potential that is restricted by the OEM downpipe.

Turbochargers are powered by spent exhaust gases created during the combustion process. The quicker these gases are evacuated, the better. Unfortunately, the factory down pipe in the B58 is quite restrictive, which results in slower exhaust gases and slower turbo spool.

The Active Autowerke F-Chassis B58 Signature down pipe utilizes 4.5” diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. It then tapers down to 3.5" where we've incorporated a stainless flex joint and then down to 80mm to meet the OEM exhaust system. We never drop the diameter to smaller than the stock diameter of 80mm.

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