Ok, I'm getting ready to purchase a set of LT's from Calspeed, my question is should I run the 1 7/8" primaries or the 1 3/4" for my setup.
My currents mods are only a Custom Tune, Borla XR-1 and a Volant CAI. I plan to install a custom grind cam in about 6 months. Will the 1 7/8" primaries still be a good choice to run with the stock cam for awhile? or should I go with the 1 3/4"?

09 GMC Sierra Reg Cab 2wd
5.3L LY5

 

imo, for the 5.3...1-3/4" would be the perfect choice.

 

do the 1-3/4" sir! I live around ya, see your truck driving around... lemme know if ya need an extra hand on the install.

 

other than the cam will u run any type of boost in ur near future? If so id do 1 7/8

 

boost possibly, but unlikely. I will probably keep it a N/A setup for awhile then maybe add a 100shot one day.

 

Thank man, I'm gonna have the exhaust shop do the whole install on this one.
I appreciate the offer tho.

 

probably a pretty penny to pay for a few hours work bud..

 

Its not to bad, the guy is a buddy of mine and owes me a favor anyway lol

A lot of people have told me to go with the 1 7/8", so I'm still a little confused on which way to go...

 

some converter will make up for the bigger primaries

 

Unless your going to run a lot of boost or go big cubes the 1 7/8 will hurt you.