What are the sizes of the Gen IV engines TB's. Been getting conflicting data.

4.8/5.3 87mm??
6.0 L76 (truck) 87mm??
6.0 LY6 87mm??
6.2 L92 90mm??



Looking at L92 heads and a truck intake. Would like a 90 mm DBW TB. I though the L92/L76 were 90mm?

 

I am curious as well. I know this doesn't help much, but the LS9 runs an 87mm throttle body, and it looks like a truck style unit with the compact motor on the side, as opposed to having the motor stick way out like the LS1 and LS2 (and possible other?) Corvettes.

 

my l92 is 87mm

 

Thats what I am looking for if they are all 87mm?

I was thinking a 5.3L one if it was 87mm night work well on an eariler motor vs get a TBSS intake. I have heard of them being ported and running a 90mm on them.