Porsche 996 NHP Cat-Bypass Exhaust Pipes
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NHP 996 Cat-Bypass Pipes, improve the sound , get some more power without the huge price tag. Plug N Play no modifications required.
Please note that the 2 last pictures show our optional O2 bungs installed on the pipes, these are not included. You can purchase them with these pipes, you will have the option to do so while checking out.
Read more below for our extended description.
|996 NHP Exhaust Catalytic Pipes Installation Instructions (.pdf)|
|File Size:||44 kb|
BRAND: NHP EXHAUST
WARRANTY: LIFETIME AGAINST DEFECTS
These Cat-Bypass pipes offer a nice 6 lbs weight reduction as follow:
OEM Cat-Pipes: 18 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.
Important Information: These pipes are not street legal, they are meant for off-road use only, they are widely used in racing, installing these cat-bypass pipes will cause the malfunction warning light to come on your instrument cluster, you can install our 02 mini-cats bung to help avoid a C.E.L or an ECU flash will correct this issue.
NOTE ABOUT INSTALLATION.
1999-2001 996 3.4L When connecting your 02 sensor the O2 sensor wiring may require additional SECURING with zip ties, due to the different location of the O2 sensor holes on the bypass pipes this is completely normal.
2002-2005 996 3.6L Your Pre-Cat O2 sensors will hook up normally to its connectors on the car side these are the Blue Wiring O2 Sensors. For the Black Wiring O2 Sensors (After Cat) the Bank 1 Sensor will have to be connected to the Bank 2 Connector on the Car Side and vice versa. This means that if you ever need to read data for whatever reason, Bank 1 After Cat O2 Sensor is really Bank 2 from your scanner and vice versa. This is because the after cat O2 sensor wiring will now be too short when installing cat-bypass pipes so they must be criss crossed , this will not affect performance or reliability of the engine, just readings when obtaining data with a scanner will be reversed.
Below is a video showing what the NHP Exhaust 997 cat-bypass sound like with the OEM Exhaust Headers and Mufflers. The 996 sound is very similar to the 997 sound as shown in the video below.
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.