Description:

The Gen 3 B58 (B58N) turbocharged inline-6 is one of BMW’s most capable modern engines, known for its immense tuning potential and smooth power delivery. However, factory catalysts restrict exhaust flow and limit turbo efficiency. Valvetronic’s NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce backpressure, improve turbo spool characteristics, and unlock a deeper, more aggressive exhaust tone — all while maintaining emissions compliance standards. This upgrade lays the foundation for increased performance on both stock and tuned vehicles.

Features:

Material: Brushed T304 Stainless Steel
System Type: 400 cell catted downpipes
Included: Pair of 400 cell EPA compliant catted downpipes, and all necessary clamps and hardware
Product Weight: 17 lbs
Manufacturer Part Number: BMW.B58.GEN3.FF.400C.BR
Warranty: Lifetime of Ownership limited warranty on 304 stainless steel and titanium tubes and welds; catalysts warranted to meet EPA emission testing and OBDII compatibility criteria for 25,000 miles from installation

Valvetronic Warranty & Returns Policy

SKU’S:
BMW.B58.GEN3.FF400C