what decat downpipe do you recommend for my94 uk classic ??? must be 3inch to match with my apexi system ! i have heard of open neck and closed neck and others but i havent a clue what it means or what it does performance whys ?? can anyone recommend any ? and rough cost ?

 

are you sure your Apexi system is 3 inch at the downpipe/centre join.
If you have a standard cat pipe on at the moment then it will be 2 1/2 inch where it fits to the centre section.

The majority of decat downpipes are 3 inch then stepping down to 2 1/2 inch at the join.

Open kneck is best, something like a Scoobyworld Ninja, Hayward and Scott, revolution.
Magnex are OK but the twin dump system they use can cause rubbing on the gearbox and there was talk of boost issues (although not witnessed them myself).

 

If you really need 3" at the centre flange, H&S do one.

As regards open neck / twindump, do a search, general concensus is open neck is the way to go.

 

Yes its 3inch at the join and it also doesnt mate to the standard downpipe 100% . i did have a tsl system before which was 2.5 inch but wanted something a bit louder , and got the apexi cheep of a mate ! will go for an open neck 3inch one then ! cheers