The JDM OEM header is not the absolute best.

However, it's probably the best quality bang for the buck.

A JDM OEM header and Carsound cat is probably good for 8 wheel horses over stock, and the new power's through the rev range.

It's a really good buy if your funds are limited, and because it's OEM, you can make it look stock by using the OEM JDM heat shields. No hassles during state inspections.