Fabspeed releases the New BMW 135i/335i Catbypass Downpipes for all 135i and 335i cars. The Catbypass Downpipes bypass the primary catalytic converters off the Turbo. They are a direct replacement for the OEM primary cats and just make night and day difference in the performance of the vehicle. Thanks to AutoCouture Motoring for bringing in the vehicles for all R&D and Dyno Testing. The most Simple and easy way to increase big HP and TQ on your Twin Turbo without a CE Light.

• Fits 2007+ 135i Cars and 2006+ 335i Cars
• Manufactured from the highest quality 16 Gauge T304SS, CNC Mandrel Bent Tubing for maximum flow and least restriction.
• Water Jet Flanges for extreme precision and fit and TIG welded for ultimate Strength, Quality and Durability.
• Direct bolt on Replacement for OEM Primary Cats with O2 Ports.
• Full 2.75" Tubing from the Turbo for maximum exhaust speed and less backpressure off the Turbo.
• NO Check Engine Lights (O2 Simulator Included).
• Greatly reduced Turbo lag and much faster Spool-up.
• 25+ Horsepower and 30+ Ft. Lbs of Torque Increase at the Wheels and more in other areas of the RPM range (Dyno Results below).
• Small sound improvement also with stock exhaust.

Fabspeed Catbypass Downpipes Video: http://www.youtube.com/watch?v=SoDDGchM-Uo

Fabspeed Catbypass Downpipes Dyno Result: