i just picked up a ls1 and im pretty sure the l99/ls3 head gaskets will work.i just want to make sure.thanks,josh

 

Nope ls3 has a 4.xx bore, ls1 does not..

 

this would help ya just look at this later on when your wanting to swap parts around

http://www.fbparts.com/ls_general_charts.htm#LS Valve Ssprings

 

yeah i know what bore is but if im not mistaking foose04 is using them on his 4.8 so why can't i use them on 5.7??

 

if i am not mistaken, your 4.8 heads will work fine on a 5.7 and boost compression. do some checking. i have heard of a lot of 5.7 guys using 5.3 heads....just not sure if the 5.3 and 4.8 have the same cc.

 

thanks man

 

thanks man but i was talking about gaskets not the heads but yeah i did do research on 862vs853 and i think i need to keep the 853 ls1 heads cuz the 862 4.8 heads will bump up the comp and i don't want to do that with fi.ls1 is already 10.1

 

They CAN be used, but you won't see any advantage from them.

You are probably thinking of the LS9 head gaskets....

 

yeah ls9 head gaskets is what foose04 is using but i was thinking l99/ls3 was the same.all of them is the 6.2 right??

 

i believe they would be the same bore, but the ls9 are 7 layer mls, and a bit thicker.