Ok guys im really wanting to run these
2009-2010 Chevy/ GMC 6.2L Truck Headers with Offroad Leads an
with dual borlas dumped, but im concerned with the 1 3/4 primaries and only 2.5 y,x pipe.
Would i lose any power by going with these over the 1 7/8 ARH or Kooks?

 

Our trucks don't respond well to only 1 3/4 primaries and the smaller collectors. I have personally seen the difference between my truck with stock manifolds and another 6.2 truck with 1 3/4 long tubes that we're tuned on the same dyno with only 10 hp difference between the two. I know that two different engines are not an apple to apple comparison, but it's close enough to make me not waste money on anything but 1 7/8 long tubes.