Do'n it for the love
Join Date: Jan 2009
Location: United Kingdom
Yes you do need long primary's, 26" long. But it needs to be a 4-2-1, so with secondary's, 10" long. This is for a road car where you want torque all tge way through the rev range. For example, when on the motorway you want to over take you shouldn't need to drop it back a gear, it should have more power to pull away.
The manifold won't give much of a horsepower gain, but it will improve torque.
Did you get my PM Marc?