1989GTA

Ok, here is the combo. L92 6.2L motor with LS3 intake manifold and Texas Speed VVT-3 camshaft, no DOD. 4L80E trans with a Yank SS3600 stall and 3.42 rear gears. Which size long tube header would be the best for this application? 1.75", 1.75"/1.875" or 1.875"? Just wondering what the latest thoughts are on this. Car weighs 3240 pounds.

litle88

iTrader: (20)

1 7/8's

Dyno Junkie

Agreed.

I'm running 1 7/8" with 3" collectors on a cam only LS3 in a 3,860lb Monaro.

1989GTA

Thanks guys. 1 7/8" it is. I can't believe I posted this in the wrong section. I went to look for my post in the external section and could not find my post. Hahahaha.

LongIsland63SS409

iTrader: (22)

1 7/8.
I am going to be running an almost identical setup except I am going to use a 3.73 gear.

Mike