DarrenSTI

iTrader: (3)

This morning I had a H&S cat pipe added to my system of already a centre section and back box.
I still have the first cat from the turbo on for MOT's, (ECU is fine changing this pipe) but was wondering what increase in bhp if any I may get from this newly added pipe?. On the drive home it felt more responsive from say 70mph, but was expecting a bit more noise.

Thinking my next step is a high flow cat of some sort whether its a prodrive one or one from H&S, then a re-map.

Thanks
Daz.

DarrenSTI

iTrader: (3)

Any ideas guys?, interested to know more than anything

Mark'sWRX

You won't get much more than around 10 more horses from the 2nd section decat and the noise will be about the same. Most of the noise will be determined by the back box and to a lesser extent the centre (if it's deresonated).

If you fit a Sports cat downpipe and remap, you'll effectively have PPP, so you'll be looking at easily over 300bhp.

DarrenSTI

iTrader: (3)

I have fitted the deresonated centre anyway, upto 10bhp was what i had just read, it does feel like a stonger pull though.

High flow is next then remap, prob fuel pump too.