Free up your BMW's N54 engine with COBB 3" Downpipes! A direct replacement for the factory downpipes, COBB?s feature 200 cell high flow catalytic converters and 304 stainless steel tubing. Custom cast bell mouths ensure perfect OEM-like fitment. Fitment verified for left-hand drive vehicles only.

These features combine to provide a free flowing exhaust outlet for high energy exhaust gases to reduce back pressure and increase turbo efficiency. Off-the-shelf mapping available for the Accessport. Fitment verified for left-hand drive vehicles only.

• CAD Designed Cast Turbo Outlets for Maximum Flow
• Dual 200 Cell High Flow Catalytic Converters
• 3" 304 Stainless Steel Construction
• Works with Stock or COBB Cat-Back
• Compatible with COBB Accessport OTS Maps

COBB Installation Guides & Manuals

 COBB BMW N54 5B2302 Exhaust Installation Instructions