When i swapped my 5.3 for a 6.2 i used
the same 1 5/8 headers. do you think they
are hurting me ? am i losing some power ?

 

They are a for sure choke point, those are tiny on a 6.2 motor. Needs 1 7/8 headers for sure to gain back power.

 

I thought as much, no one makes LT's
for this truck a diff size. we had to order
25 sets and send a truck to Doug Thorly
for them to make them for a Colorado 5.3
There were not a lot of trk's made. this was not
a cheap deal for our Colorado Club

 

Well, I found out my LT's are 1 3/4 not 1 5/8,
that's a little better. I found a set of 1 7/8 race
LT's, But damm almost $700.00 bucks. I'll put
that money toward my LSA swap.