Porsche 997 NHP 200 Cells Catalytic Converters X-Pipes Design
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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.
By far our biggest seller when it comes to 200 Cells Cat-Pipes for the 997, feel the difference in engine response and enjoy the better sounding exhaust. If you need to add some spice into your 997 look no further.
Read our extended description below..
BRAND: NHP EXHAUST
WARRANTY: LIFETIME AGAINST DEFECTS
X-Pipes are known to push exhaust gases in a more efficient manner usually faster than traditionnal crossover pipes, x-pipe improve scavenging of exhaust gases and the nice part about the x-pipe is that you hear the sound of the 6 cylinders combined which results in a smoother sounding exhaust system compared to the traditionnal crossover pipes that produce the sound of 3 cylinders per side which is normally louder and not as smooth. Technically an X-pipe will make more HP and Torque gains vs traditionnal crossover pipes the only downside is that you may feel a loss of torque on the low end not because it makes less power or torque but simply because the X-pipe makes more power and torque on higher RPM pand, but depending on where your car will be used you may hardly feel the difference in low end torque loss if your using your Porsche as a daily driver, really in oir honest opinion the low end torque loss should not be a factor on a daily driver.
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.