Afternoon all the time has come to modify my classic further (Hoping for around 340bhp when done) .I am taking the car to Scooby Clinic and amongest the mods I am having I cant decide wheather to by a High flow sports cat downpipe from scooby world or a full de-cat downpipe from Scooby clinic (centre cat has allready been removed).what would you do and also if I go for the sports cat downpipe is there a great deal of difference between the 2 apart from failing the M.O.T.Last thing what up-pipe do I buy because I haven't got a clue.(w reg uk classic).Long post I know but please read and HELP

 

You'll be fine with the just the one CAT in the downpipe.