GMCtrk

iTrader: (27)

I'd go as big as you can fit. All the "loss of lowend" stuff is bullshit, in my experience.

pewterliftedz

iTrader: (4)

dang id like to see that. stew had enough problems with the stepped headers...

Phantom

iTrader: (16)

LOL that's what nitrous is for

I figured someone else would say it, figured I'd beat them to the punch

BigKID

iTrader: (5)

jason26 ran the full 2" kooks f-body headers with good fit... https://www.performancetrucks.net/fo...eaders-443336/

I am running the stepped headers and have a slight clearance issue with #6 primary tube. Here are a few threads with some good info.
https://www.performancetrucks.net/fo...eaders-471855/
https://www.performancetrucks.net/fo...verado-503164/
https://www.performancetrucks.net/fo...trucks-490555/

milkey57

iTrader: (6)

I picked up a set of 1 7/8" and i swear i picked up tq, according to the butt dyno, if the builder says 2", do it and like stated above n20 fixes all softness lol

TXsilverado

iTrader: (19)

lol i know better than that. I put a fast 90 and stepped headers on my LS1 which everyone on tech preaches as a bottom end killers and i gained massive power down low. too bad it never translated to the track. slap them in and find out

dirt track racer 81

iTrader: (45)

I'm the builder and I say 2" lol...

Vortec350ss

iTrader: (20)

I agree with this... I had 1 7/8" on a bolt on only LQ9 with plans for more down the road and lost nothing down low. I could MAYBE feel it when the converter was locked at 40 MPH... meaning 1200 RPM, but thats part throttle tip in... not a big concern if its real power and acceleration you are after.