hi can any1 tell me whats the differece between a downpipe and a up pipe and where do they go

 

the up pipe connects to the bottom of the turbo, after the manifold, the downpipe connects to the rear of the turbo (opposite end tothe cleaner looking fanblades)

basically the up pipe pushes the exhaust gas "up" in to the turbo in order to spool it up, the downpipe, carries the gas out of the turbo towards the backbox....

Hope that helps

 

thank matey so if im de-cating my scooby will i have to change both pipes or just the downpipe

 

Change both pipes for what purpose???
Model and year?

 

iv got a 95 wrx wagon and im after more bhp thats why im de-cating but not sure if ill have to change both pipes as i dont want to waste my time changing one if i have to change both

 

In standard form the 95 WRX Wagon has a cat in the D/P so start there.
An exhaust system like Revolution with their D/P will add power and give a nice exhaust note outside.
The standard up-pipe on the WRX Wagon M/Y 95 has no cat but is inefficient.
Consider ported headers and up-pipe or better still ported headers and MATCHED up-pipe when funds allow.
With the full exhaust system, ported headers and matched up-pipe you could typically have added 40 bhp and a shed load of torque.