82cetuner

iTrader: (9)

does anyone know what the stock LS6 intake opening diameter is?

twitchtwice

iTrader: (12)

78mm. same as the ls1

sinful7

iTrader: (1)

i think you can port it to 80mm, and i also heard of some company being able to mate a 90mm ls2 opening on a ls6 intake so you can run a 90mm throttle body... I guess its not far off a fast 90. but i couldnt tell ya who does it.

mknight759

iTrader: (8)

here it is http://www.tpis.com/index.php?module...ed+LS6+Intakes

toadzq8

iTrader: (43)

I measured my LS6 with calipers and it is 75mm, using a 78mm fast TB you can feel the lip. Not a lot of plastic in between the seal o-ring and the ID don't think I would try to port unless you know what your doing,