I'm getting ready to Turbo Charge my Hatch. I was going to put on a Buddy Club 2MM Thick Headgasket, however, I did some searching and found quite a few horror stories on adding Aftermarket Headgaskets.

I have a completely stock JDM B16A, and my goal is 300 WHP for aggresive daily driving. Will I need to lower compression, or will it be stable for my goals and needs?

 

I wouldn't sweat lowering compression, you can do 300 whp on pump gas and stock compression.

 

I would probably go with a set of Forged pistons around 9.0:1 or close. You can probably get away with boosting with the stock pistons and compression just fine but honda pistons start to crack around the ring glands on boost, which will make you loose compression and smoke like a diesel.. been there done that..

 

First do a compression test and leak down, see how healthy the motor is. If the motor is healthy go for it, 300hp on a b16 won't be to hard to achieve, you will need to upgrade a few things on the top portion though ( head area like cams, intake manifold and such )