De Cat Pipe

[craigturbo2]

As you can see i am going to try a few mods but it is always good to gage different opinions.Rather than changing my full exhaust system,i wondered if any one has or is running a De Cat Pipe.Mine is running a G Pipe so wondered would this have an adverse effect.

[ultra violent]

Your cat has almost certainly colapsed or melted or is just bunged up. I found replacing mine really helped. If you replace the cat you'll probably want to put your muffler back on else it will sound like a Nitro Tractor, which if fine, if you like that sort of thing.

Headers would be the next thing, they won't make a massive difference to BHP but will improve torque and spool up the turbo faster. However, there are a number of header designs in the market that will give massive BHP increase. This has nothing to do with the headers but rather the wastegate pipe causing overboost.