BMW M3 & M4 F80 / F82 / F83 Primary Catbypass Downpipes

Downpipes replaces the heavy and restrictive factory catalytic converters with a straight-pipe design for maximum power and exhaust sound.                                                                                                                          

FEATURES:

• Fits all BMW F8x M3 & M4 vehicles (2015+)
• The perfect option for track cars and those who seek the ultimate in agressive exhaust sound
• Designed to fit seamlessly with the factory exhaust system, or as an add-on to Fabspeed's Valvetronic Exhaust System.  (Also compatible with any other aftermarket exhaust system that is designed to fit like OEM.)
• Replaces the restrictive factory catalytic converters with a straight-through "straight-pipe" design for maximum power and exhaust sound.
• NOTE: Catbypass downpipes are recommended for track or off-road use only.