CR big Valve head

[Laramie4x4]

Hey guys... I'm doing some extensive work to my head and want to add some larger valves... any idea who had done such? what size they went to? where I can get them??!!! thanks Michael.

[triton]

that's a good idea but, I don't think it's necessary. What you can benefit from would be to install all inconel exhaust valves in the intake side. Intakes are 30 degrees and the exhaust are 45 so, you need all 45 degree seats. Stock Cummins exhaust valves are inconel so, that's where you can get them from.

[Blacksdieselhp]

I would contact Greg houge or Greg at ZZ Fab. Either one can tell you exactly what you need to do. I am taking a head to a guy next week that builds custom 409 chevy heads and some top fuel/nitro engine stuff. Hopefully we will be able to get some quailty head work done for a decent price and turnaround time. I'll let you know if we come up with anything good.

[BCB]

I'd like to do this to my 12 Valve also