Originally posted by mcgainer:
PM warmonger, he has some dyno #s. If you just look at the stock manifolds..then at the headers...you'll see just how restrictive they are.



Actually his before & after dyno is gutted precats vs MSDS headers.
Thus showing how restrictive even gutted pre-cats are and even gutted pre-cats are much better than stock.


2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.