hi guys its the exhaust guy thanks for all your info on the problem, well i got some desisions to make a gm right through will cost me in cornwall dealership £1123.39.and thats got to hurt anybodys pockek.kwik fit were my mate is has done a deal full system with cats instaled should be £574.30 but can get for £480.00.and this is a bosel exhaust.3years guarantee.however powerflow have given it a look and complemented me on my bosel flexi pipe job to get me by with not having any cats,they can do cats,system,plus to bypas pipes so can have best of both worlds and twin 3inch outward rolled tail for £360.00.fitted with two universal cats,two centre boxs two keep floor pan noise down and back box.so guys which way do you think considering i got uprated fuel pump on,stainless steal dual air induction kit do you think should go the hole hog like powerflow recommend to get most out of car with induction etc or keep it standard system.hense gm very dear even if had trade card and i thank you all for the help with that as well guys so many kind offers that i havent rulled out yet .just want to go down the right road first time and final time.considering i have asked powerflow to make a system thats not loud as well ,as i dont want it loud ,but sporty is fine,i think for value and made to measure in stainless with the best of both worlds decat option and cat option to my own conveneince.its hard to decide and part with such large sums of money as any one of us married men with kids will know (got to keep wife happy to)she likes the sporty idea but does not want it noisey.please give me some feedback so can make a majority vote here would be very gratefull.thanks guys mike(remembered to keep caps lock off) :-/