I ordered a set of 6.0L LQ9 heads and I recieved 035 heads. I thought the 6.0L heads were 317? I don't doubt they are 72cc heads, just don't know the differance. They are aluminum, so do the 035's flow better, worse, or the same as the 317's?

 

no one knows??

 

Exactly the same thing, only different casting numbers for different years.

317 01 and up LQ4 6.0 aluminum heads
035 02 and up LQ9 6.0 aluminum heads



Casting Number 317 or 035
LQ9
01+ 6.0L Truck
Material: Aluminum
Combustion Chamber Volume: 71.06cc
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

 

OK thanks for the info. I thought they were 72 cc tho

 

they round it to 72cc.