I'm really considering adding headers to my 08 5.3
What gains should I expect? Allready have custom tune and CAI.
I know it will have to be re-tuned and what about fuel milage, will
it be better? I can average 19.8 now.
Thanks,
DVS99

 

Long tubes with ory will really wake up your truck. Me personally didnt experience any added mile but ive been known to have a very heavy foot.

 

i seen a tuned 5.3 pick up 22hp at the wheels with longtube headers and they tuned agin after the header install

 

just do it!

it opens the door to future mods

 

I picked up more e.t. Gain from headers and o/r y pipe then from the 4.10 gear swap. Do it.

 

i got a 10' 5.3 which size LT header is better the 1 3/4 or 1 5/8 or 1 7/8 primaries? other mods cai, magnaflow, tune.

 

1 7/8 primaries is best

 

I'd stay with the paceseter 1 3/4. Better lowend torque. It's exactly what a truck needs.

Ill be adding the same headers to my 6.2!

 

I went with pacesetter LT/ORY. Picked up a good amount of power and they.are really affordable

 

what do u guys think about the 1 5/8 prim., will they give all around increase instead of just in the low?