Originally Posted by costina
The best one to have is the T25 ecos one
flow upto 600 bhp apparently
Next is the 4x4 (better elbow design i think)
and then the 2wd
The info above is for the inlet plenums. The manifolds are the same (with the exception of the T25 manifold, which has an 1/8th NPT tapping in the middle).