Porsche 997 NHP 200 Cells Catalytic Converters
CALL TOLL FREE 855.466.2977 (During Business Hours)
TEXT / WHATSAPP 305.308.2009 (365/24/7)Fitment: 05-08 997 C2/ C4 / C2S / C4S
Usage: For daily driver and occasional track use (Beginners).
For medium track use or heavy track use only we don't recommend any exhaust headers with catalytic converters we only recommend Racing Exhaust Headers with no catalytic converters. The warranty is void for our exhaust headers with cats used mostly or only for racing purposes.
The best 997 Gen. 1 Catalytic Converters available for your 997, don't waste your time elsewhere these are the best on the market . Replacing the factory restrictive Catalytic Converters with the NHP 200 Cells Cat pipes is where you should start when looking for best power gains on a exhaust system the factory cats are very restrictive, replacing them with the NHP Cats will greatly improve exhaust flow and will improve sound.
Perfect fitment with factory exhaust or aftermarket exhaust, the O2 Sensors fit perfectly, these mount just like the OEM cats re-using same clamps and mounts. Made of T-304 Stainless Steel with a polished finish. Cat replacement should get you approx 10HP+ Gain.
Weight is 18.5lbs (L+R) OEM Cat-Pipes are 16lbs the reason for the extra weight is that NHP uses thicker stainless steel flanges and high quality T-304 SS. These are direct replacements, no modifications are necessary, please use our instructions for the 996 Cats, replacement procedure is the same.
We can confirm that these cats do not trigger a Check Engine Light however these remain High Performance Sports Catalytic Converters, please read information below.
IMPORTANT MESSAGE ABOUT 200 CELLS CATALYTIC CONVERTERS.
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 are built and meant for off-road purposes.
Our Exhaust Products “Lifetime Warranty” does not cover catalytic converter error codes.
Please note that when installing High Performance Catalytic Converters there is a possibility that you may get a “Check Engine Light” for Catalytic Converter Inefficiency or other Catalytic Converter related error codes. This may or may not happen, this is due to lowering the Cell Count of the catalytic cartridge, in other words we need to work with the same surface area with a lower cell count, most OEM Catalytic Converters will have 600 to 800 Cells per square inch, High Performance Catalytic Converters are only 200 Cells per square inch. If you get a check engine light it’s not because the product is defective but it’s the ECU picking up the difference and relating those error messages.
There are several ways to deal with this.
Most Efficient is the Flash the ECU with performance software, make sure to tell your tuner that you have 200 Cell Cats. This is the most expensive and most efficient.
Use 02 Bungs, many have been successful by using 02 Bungs however this is not 100% Bullet Proof.
Purchase OBD2 Scanner, read your codes and erase them. For those of you who are not annoyed by the use of a scanner on a weekly basis this is the cheapest solution.