How much horse would I expect with DC stainless 4-2-1 and custom 2.5 inch straight pipe no cat for a stock B16A1??

Thanks

 

http://www.importreview.com/reviews/JDMRvs4-2-1.html this should help.

 

I wouldn't buy anything from DC, don't buy the hype. Their parts are decent but for the cash you might as well go with something bettter like a JDM type R header. Straight pipes can get you up to 4hp max. You will feel it but the noise will make the car seem faster.