Replaces the restrictive factory catalytic converters with much less restrictive straight-through pipes for maximum flow and performance
DISCLAIMER: This product removes the OEM catalytic converters from the vehicle, and as such, is strictly intended for closed track events and off-road use only. Racing Cat Bypass Pipes are solely intended for track and race cars as they are NOT California Air Resources Board Certified and not EPA certified. You are hereby informed and warned to check your local, state, and federals laws before buying and installing these or any aftermarket parts to be sure whether usage is in violation. All installation-risk and use-risk is borne by the end-user and installer of these parts.
I recently purchased and installed these cat bypass pipes on an '04 Cayenne Turbo. I wanted improved performance but did not want a loud exhaust under normal driving conditions and that's exactly what I got.
Performance was rated at +27 hp and the difference is very noticeable. The vehicle runs much more efficiently. My Cayenne has a little more growl under normal driving conditions and when I mash the gas, the engine sings.
I'm noticing MUCH less turbo lag and as the turbos spool up, they pull stronger than ever. I can't believe how much this simple enhancement allows me to speed through the gears.
I'll go as far as to say that these pipes are the second best performance enhancement for these vehicles, only short of a computer tune.
Installed these cat-bypass pipes in my '06 Cayenne Turbo with the intention of a mean growl and rumble with improved acceleration and that is EXACTLY what I got. The sound these pipes make on idle and WOT is just down right incredible!
The acceleration and throttle response has increased drastically as well with improved boost response with no delay whatsoever.
Keep up the great work, Fabspeed Motorsport!