OneFastShop B46 3.5 Inch Catless Downpipe BMW 330i 430i Supra A91 2016-2026

Wake up your B46 with the OneFastShop 3.5 inch catless downpipe. Engineered for US spec B46 powered BMWs and the Toyota Supra A91 from 2016 to 2026, this is the biggest bang for buck mod available for the 2.0L turbo platform. Stripping out the factory catalytic converter unlocks real power, sharper response, and a far more aggressive exhaust note.

Real World Performance Gains:

• +15 to +27 wheel horsepower with proper tuning
• Even more power on upgraded turbo setups
• Significantly faster turbo spool and quicker throttle response
• Deeper, more aggressive exhaust note from the turbo outlet back
• Stage 2+ tune ready

Features:

• Full 3.5 inch diameter mandrel bent tubing
• 304 grade stainless steel construction
• CNC machined billet flanges
• Hand TIG welded joints
• Welded mounting bracket included
• Integrated flex section to absorb engine movement and heat cycles
• Lifetime warranty on defects
• LHD and RHD compatibility
• Compatible with OEM and aftermarket cat back exhausts
• Direct bolt on installation, no cutting required

Technical Specs:

• Diameter: 3.5 inch (full diameter maintained from turbo outlet)
• Material: 304 grade stainless steel
• Tubing: Mandrel bent
• Flanges: CNC machined billet
• Welding: Hand TIG welded
• Mounting: Welded bracket included
• Flex section: Integrated
• Configuration: Race configuration, catalytic converter removed
• Engine: BMW B46 (US spec SULEV) and Toyota B46 (Supra A91)

Contents:

• 1 B46 3.5 inch catless downpipe

Gasket required for installation: A turbo to downpipe gasket is required to seal this downpipe to your factory turbo. Our 4 Inch Turbo to Downpipe Gasket for BMW B46 is available separately, add it to your order from our store.

Vehicle Fitment:

Important Note (B46 only):

This downpipe fits US spec B46 SULEV engines only. It is not compatible with international market B48 engines, which use a different turbo flange design. Verify your engine code before purchase. This product is intended for off-road and track use only. It is not legal for use on public roads and may not comply with emissions regulations.