How much BHP will a downpipe add to GT4 Options

[alf15]

I'm thinking of getting a downpipe or de cat for my GT4, im just wondering how much extra HP will it add to my gt4.

I was looking on ebay and they have a good few, what are the downpipes for $60 like? Or what is safe price range for a good down pipe that wont crack etc

What do you think if these to downpipes.

Downpipe 1

Downpipe 2

Thanks

[alf15]

Thanks for the advise lagos! Whats boost creep, im just an beginer?

[eggman40]

Thanks for the advise lagos! Whats boost creep, im just an beginer?

its when your boost presssure rises higher than where you have it set. Basically if your car is set to boost at lets say 10psi. and then when your on the throttle, your car begins to boost higher than 10psi. you didnt intend for is to happen, thats why they call it creep. sometimes with a more freeflowing downpipe, the turbo will spool faster than the wastegate can discharge the excess exhaust pressure and keep it at the set psi.

hope this helps.