looking at getting the final cat outa my exhaust by replacing the header pipes ive been looking at some but if i change em would i need to remap my car its a bug eye 52 reg also what is the up pipe and where does it go and what about fitment do they all more or less fit all scoobys or are they all diffrent im sure somebody can enlighten me about this as this is gunna be my next mod my car has had a tek 2 remap at scooby clinic already (running 280bhp) so what gains could i expect if any heard about 20-30 bhp is this true

 

is the cat in the up pipe or the down pipe ?

 

can nobody help with this ?

 

Ive recently replaced my downpipe - (there is a cat there) & I opted for a sports cat. I no longer have my second cat (the one that joins the mid section). I also have uprated headers. Just need the $$$$ for a remap now

 

On a standard car :-
Headers feed into - can be ported for better spool-up and torque
One cat in the up-pipe - can break under lots of boost - throw away !
One cat in the down-pipe - replace with a 100 cell Sports cat = pass MOT
One cat in middle section - throw away !

HTH

DunxC

P.S. Don't know how much the up-pipe affects final bhp....

 

i have got straight through de cat from the turbo back but dont fully undersand how the front is piped up are headers and manifold the same thing i think the up pipe joins the manifold to the turbo is that right

 

Yep !

 

so what does it mean when you say porting the headers and is there a cat in the header or just the up pipe as mentioned above

 

Cat in uppipe..... porting headers is where material is removed from the headers to match the exhaust ports from the head,normally there is a step which restricts the flow,also can match up and smooth the inner sections where the headers can be split

 

If it is a wrx it has a cat in the uppipe that runs from the headers also called exhaust manifold to the exhaust wheel of the turbo.
Getting shot of the uppie with the cat in it will give more power.
A guy on here specialises in porting the headers and supplying a specially designed uppie matched to the headers. Give him a PM for more info harvey is the user name.

 

cheers rigga im clued up on how it all goes now mate you explained it well will pm harvey and see what he asking for em

 

thanks to all you other guys aswell one lat question is will i need a remap ive had a tek 2 (i think can chaeck) at scooby clinic so how much you think itll cost . now ive had some work done its cheaper i heard because i have a license anyone know about mapping can clear this up cheers

 

Yep ! it's the licence paid bit.... you only pay for the labour for a re-re-map, and maybe a "bit" on top.... i.e from £350 (upwards !)

DunxC

 

GULP!

 

Yep cheap these cars are not...... fun though lol

 

i have a set of gruppe s headers and up pipe for sale in great condition if you are intreasted you will gain around 25ft lb of torque and aroubd 15bhp when fitted they make a big diffrence