iv just gota de catt centre + bak box (afterburner). i was goin 2 get a tsl downpipe next PUT with both catts out what about my back presure? does it matter? most of my scooby friends hava full de catt put iv heard that sti/p1`s need back presure to work. is there sum way around this (eg a gud free flow cat?) all help welcum, cheers. michael.

 

The P1 only has one cat and it's in the DP.

 

de-cat it!

you won't regret it