What is the difference between these manifolds?
What if anything are the differences between exhaust manifolds from our 1998-2002 LS1's and the exhaust manifolds from a 6.0L truck based engine?
I've heard for some reason the 2000 and up exhaust manifolds on the fbody cars flow better than the 1998-1999's for some reason.
Any help would be great.
Ryan



