Hi, which primary and collector size would you goż 6.2l chevy ls-series, magnacharger (2300) into truck awd weighting 5500 lbs, 5000 feet above sea level, 248/251 lsa 116 .624/.624 lift, 10.3:1 rc, gm ls3 cnc ported heads, 3500 stall, 200 nos shot.

 

This is easy... 1 7/8" x 3"

What truck? I'll be putting ARH on my wife's Escalade

 

This^

Either ARHs or Kooks are good.

 

silverado-cheyenne 2005

 

i was thinking of 2" primary and 3.5" collector... can't find who makes this headers, does anybody know who makes custom ones?

 

I know Kooks makes them for the Fbody. You can call them and see if they can custom make one for your application.