reditr

what should i choose? 2,5 or 3" exhaust whats your opinion?

thanks
Red ITR..soon 2 change!

WRXBOB

I have the scoobysport (AKA Hayward & Scott) down pipe, its 3" reducing to 2.5" towards the flange, then I got 2.5" all the way back. Also have my up-pipe de-catted.
The car is awesome like that.
My mate with same car has just gone for a full 3" system from turbo back and its REALLY good !
If I was starting again I would go for the full 3" system!

All IMHO

Bob
my02WRX

Tim W

iTrader: (1)

What turbo are you running, what exhaust system are you running, and where do you want your power band?

Basically if you have a large turbo (ie TD05 or VF series) then the 3" bore will help a little, but you will find that it helps more at the top end than the lower end of the reve range. Plus if you havea 3" bore downpipe you will need a 3" bore exhaust system to match it.

Jeff Clarke

I am a little puzzled as to why my car started wrecking spark plugs and misfiring badly after doing this mod. Been told colder plugs like the WRX PFR7B's will cure it.
Surely I can't be the only one to have experienced this. Never heard of knackered plugs needing changeout after 10k miles on any other vehicle.
The misfire only manifested itself after giving her a damn good thrashing. Keen to see what happens with the new 'colder' plugs at £45 for 4!
Jeff.