Porsche 997 NHP Cat-Bypass Pipes
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A popular mod to achieve HP Gains and better sound on your 997,our crossover style install just like the originals with no modifications.
Read our extended description below for more...
BRAND: NHP EXHAUST
WARRANTY: LIFETIME AGAINST DEFECTS
These Cat-Bypass pipes offer a nice 6 lbs weight reduction as follow:
OEM Cat-Pipes: 14.4 lbs (L+R)
NHP Cat-Bypass Pipes: 8.4 lbs (L+R)
They are made of Stainless Steel and will last you a lifetime, don't pay more elsewhere get the best here.
Gaskets and Hardware included.
OPTIONAL, if your factory sleeve clamps that connect the catalytic converters to the mufflers appear to be very rusted and may need replacement take a look at our sleeve clamps. They are made of Stainless Steel and will last you a lifetime, don't pay more elsewhere get the best here.
For the State of California our Exhaust Products are not C.A.R.B.
Our Exhaust products have no guarantees about passing emissions in your state.
Our High Performance Exhaust with sports catalytic converters and cat-bypass exhausts are built and meant for off-road purposes.
Our Exhaust Products “Lifetime Warranty” does not cover catalytic converter error codes.
Please note that due to the deletion of your catalytic converter you will encounter a check engine light. You may want to flash your ECU to avoid that or install a 02 Sensor bung to help eliminate the possibility of a check engine light.
Below is a small video showing what the NHP Exhaust 997 cat-bypass sound like with the OEM Exhaust Headers and Mufflers.