Originally Posted by
1QwkSport2.5r
Nitrovein - it appears the measuring device wasn't centered in that picture, but it's just the camera angle. It was about as close to center as I could get it. It's a fairly long header, but to clear the chassis and starter mechanism, it kinda has to be. Using a shorter manifold is gonna put the pipe at a goofy angle, but there isn't much of a choice I don't think. Is this cylindrical Losi header gonna kill the powerband *that* much?
I meant that you should have a view from the right to see the center of the bend at the top.
According to my quick math the extra length should shift the power between 5-6000 rpm compared to a short manifold.
Measure the stock manifold and see, but my guess is that it's 12mm all the way.
I like the Novarossi manifolds as there is enough meat left on the bone to enlarge it.
With stock timing and long manifold you will have a lot of bottom end at least.