i was helpin a production guy change his battery on a well site today and noticed the heads are 323's its the new 07 2500 hd..he also got stuck and ripped up the front of his truck

 

I dont know anything about those but on my mom has a 6.2 denali and they say those head are one of the best flowing out there..

 

They should be the same as the one's commonly called the L92's. They aren't really specific to the L92 engine, they also come on the L76 and LY6 engines.

 

yeah, man....the L92's are the new big thing now.

 

Don't you have to swap for the L92 intake to use those heads?

 

Yeah I'm pretty sure you do have to do the Intake. But it's a diffrent intake , still a tall deck intake that produces the low end torque. But it also has a bigger Throttle body. So I figure it'd be a great swap to do the Heads, Intake and Tb at the same time. It would have to produce some good power gains.

 

does the L92 intake flow still drop off at high rpms? (5500-5800 like the 6.0 intake)

 

I spoke with a guy last week that builds a lot of 6.0 stuff he said his shop has a "custom" L92 head and L92 cam, headers and exhaust with a tune. They average 415 wheel hp on awd trail blazers...

Ill see if i can find the link he sent me.. it sounds retarded.

http://www.youtube.com/watch?v=QOKfH...eature=related

 

Not if the truck already cam with those heads.

If you want to use them on one that didn't come with them, yes you'll need a different intake along with a few other items. The L92 truck intake is improved over the previous intake. I'm expecting to see some very good results from those using it. A friend of mine is going to be putting one on his 7.0L.