edizio

Just wondering what most people tend to do? I've had a nice chat with some of the guys at pole position today and they were recommending that I use a decat pipe for my JDM WRX STi version 6..

I've read that a re-map is mandatory after removing the cat due to boost spike and det, but is it really worth removing the cat, I heard that you can lose a lot of back pressure from removing the cat? There's only one on my model; I'm getting it remapped as I've already put a full stainless exhaust system on with a panel filter.

urban

iTrader: (1)

Personally if it was me, I'd replace the downpipe with a hi-flow unit

DonNedly

iTrader: (10)

on a turbo car you want as little back pressure as possible, mate.
decat will only help your car.

WildPikey

If you remap then decat it later you will have to have the map tweaked anyway costing half as much againso definitely worth doing before.

kevvy72

go for decat then remap.yr car will love you.....ps a slow drive down to the remappers lol

on my wrx 06 i ended up with 355bhp an 408lbs torque

edizio

Yeah, thanks for the advice! I've heard horror stories of damaging an STI by driving without the cat due to boost spike.

Anyone had any issues with the police/insurance by not having a cat?