I have also jumped on the l92 band wagon. I ordered my set from TSP and hopefully I will have them by middle of next month. I will be using a Becks intake though. It should rock

 

Richard, are the valve lengths different from the LSx gen III engines?

 

The factory stock L92 valves are the same length as the 6.0l and LS1/LS6 engine family. Our aftermarket valves will probably be a bit longer to accommodate the higher lift cams. I don't have an exact length worked out just yet, but it will probably be in the +.100" area. We're definitely going to have a longer tip length on these valves to reduce the possibility of rocker arm/retainer contact.

Hope this helps.

Richard

 

Other than the corresponding Intake manifold, is there anything else you would need to utilize the L92 heads on a stock LQ4 shortblock?

 

A stock L92 gasket or an aftermarket 4.06" Gasket

Thats it....

 

check out this trailblazer SS with L92 heads, and L92 truck intake

https://ls1tech.com/forums/showthread.php?t=647662

442 RWHP
Very impressive, I'm so going L92

 

366 hp and 380 torque 6.0 L76 to 345 hp & 375 Torque Lq9 - It is a 21 hp increase and 5 lbs of torque - $ 1000 - is it worth it? I wonder if the heads are making this or the intake?

 

Well consider how much better they would respond to a cam and headers.......

 

True, but it is a lot of work

 

Yeah, but the numbers will show its worth it........

I'll let you know in a month or so.