BMW 135i / 335i (N54) 3.0" Stainless Steel High Performance Downpipes | Boosted Mentality Motorsports

Unlock serious power and sound with the Boosted Mentality Motorsports 3.0" High Performance Downpipes for BMW’s legendary N54 twin-turbo engine. Designed specifically for the 2007–2010 335i and 2008–2012 135i (RWD only), this downpipe set replaces both front and rear factory units with free-flowing, mandrel-bent 304 stainless steel pipes that eliminate restrictive catalytic converters. The result? A significant reduction in backpressure, faster turbo spool, sharper throttle response, and an aggressive exhaust note that announces your arrival.

Unlike competitors that reduce diameter near the turbos, our true 3.0" design maintains max flow all the way to the 2.5" flange connection—delivering peak performance without compromise. Each kit is handcrafted and TIG welded for strength and durability, and includes all the gaskets and high-grade hardware you’ll need for a proper, hassle-free install.

Pair with a tune to maximize gains—expect up to 30+ HP and 35+ lb-ft of torque* at the wheels.

Features & Benefits:

• Gains of up to 30whp / 35wtq* when paired with tune

• Full 3.0” mandrel-bent 304 stainless steel construction

• Smooth TIG welds for strength and clean flow

• Retains factory flange locations for OEM-like fitment

• Includes new gaskets and grade 12 hardware

• Lifetime warranty against defects and fitment

• RWD fitment only – not compatible with xDrive models
  

Fitment Guide:

• 2007–2010 BMW 335i (E90/E91/E92/E93) – N54 RWD

• 2011–2013 BMW 335is (E92) – N54 RWD

• 2008–2012 BMW 135i (E82/E88) – N54 RWD

• Not compatible with AWD (xDrive) models

Upgrade your BMW N54 platform with hardware that performs and lasts. Boosted Mentality Motorsports—where horsepower meets quality.

*Performance horsepower, torque, and fuel efficiency improvements are dependent on numerous factors such as other modifications done to the vehicle, proper vehicle maintenance, fuel type, driving habits, altitude, and other conditions.