CTS Turbo BMW 135i/335i N54 CAST 2.5" Downpipe Set (RWD only)

This CTS Turbo cast downpipe set is purpose-built for rear-wheel drive BMW 135i and 335i models fitted with the N54 twin-turbo engine. Featuring a robust 2.5-inch cast construction, this pair replaces the restrictive factory downpipes to significantly reduce exhaust back pressure. The larger diameter and optimised internal design allow spent gases to exit more efficiently, supporting improved turbo spool characteristics and throttle response. Engineered specifically for the N54 platform, these downpipes deliver a foundation for enhanced engine breathing and complement other performance modifications.