i have a 2003 sti which im wanting to add a decat dowpipe to. the exhaust on the JDM is a 3 piece similar to a classic shape, i have a hayward and scott 3" centre section(brand new) in my garage for a classic!!! will this centre pipe work with a decat downpipe for a newage car from hayward and scott??? as the centre has custom made 3" flanges and i can get hayward and scott to make the downpipe the same

 

To use the 3" centre pipe that you already have you would need a classic style down pipe with a twin scroll flange ( £175 + vat ).

The newage down pipe would be to short.

Would back box would you be using ??

Ian