When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
best rpms i guess you want? if so like he said 5400-5500rpms is good any higher on a stock cammed or n/a car and it doesnt make alot of power past that.
With long tubes i would raise mine to like 5600-5700rpms as the extra flow would be good. But with stock manifolds there is not much power above 5500rpms in my car.