CAT replacement pipe

A Cat Replacement Pipe, or CRP, is a device used to replace the Catalytic converter on an internal combustion engine. Somethimes refered to as a de-cat pipe or decat or straight catpipe, it's nothing more than a straight through piece of tubing!

Alternatives to this are a Sports CAT.

Noise

Large increase in noise, pops & bangs on overrun.

Annoys the neighbours!

Performance

About a 3 BHP gain on the non-VVC engine.

MOT & Legality & Insurance

It is illegal to use your car on the road without a CAT and not just because of the emissons. This may cause you a problem in the event of an insurance claim. The procedure to change your CRP is quite simple.

111S & VVC Engine

Performance is lost if fitted to this engine due too???