Pretty simple question here, but honestly I don't if it will help. I have my 81.50mm lsvtec that im building, but due to me getting a 600rr I wont finish that engine for at least another year. So im just slapping on a 14b, sidemount, dsm injectors, and using the hf mani that I got all for FREE on this stock d15b non vtec engine.

My question is, I have my 3'' vibrant, would putting that exhaust on gain power over using the stock pea shooter exhaust on the car or is it too big for that small of a turbo and that small of a engine? The car will be street tuned on crome, but im not putting it on the dyno.

 

The 3" will flow better and yield more power over your stock exhaust.