JBS Auto Designs
Whitting Valley Road
Chesterfield Derbyshire
S41 9EY
Opening Hours
09:00-17:30 Mon To Sat
De Cat
We currently have no products in this category. If you were hoping to find a certain product here, please feel free to fill out the form below. The more information you can provide, the better. Your car's make and model as well as the engine would be very useful, followed by the product you were after.
Catalytic converters are necessary to reduce emissions but create back pressure due to the exhaust gases being forced through a catalyst, and therefore decrease high end engine power. Many modern catalytic converters only produce 1-3 psi of back pressure. By replacing the factory catalytic converter you will free up approx 5-10% power. The car will rev a lot easier and benefit from an increased throttle response. All CAT bypass pipes come with a hole for the lamba probe and most can be bolted on or off. The car will also become slightly louder as you have in theory removed a silencer box. If you remove the CAT you do run the risk of the car not passing the MOT because of increased emissions. De-CATS are not for road use and are only recommended for track cars





