I've used C&L products before and they are well made and perform well. I haven't read up on it in awhile but I'm pretty sure you'll make more hp in high rpm, but not as much tq in the lower revs like the stock unit. I'm guessing it makes around 15-20 rwhp. Do you have other mods? What are your future plans? It seems like the manifold for a N/A route. Stock 3.31 or 3.55 gears might not be aggresive enough with the rpm dropoff and different powerbands the C&L has over the stock manifold.