The JUN intake manifold also comes with their fuel rail, which they just so happen to think is worth about $500. You really don't need this unless you are planning on making some major power. You probably won't see very of much gain in peak HP, but where the stock manifold loses HP in higher rpms, the JUN manifold will hold the power better to redline due to it's flow characteristics. Bottom line is this is one of, if not the best, manifold I've seen for the SR. If you plan on making insane amounts or power, have the money to spend, and want something that nobody else will have (except for me when I start my project

) get it. If not, then get the Greddy manifold and save alot of money.