Pray

iTrader: (7)

I am porting my own 243's and want to upgrade the intake and exhaust valve sizes. They will be on a 4" bore. I was reading that you can put 2.055" intake and 1.60" exhaust valves in the stock valve seats when cut for them. First off, is that true? Second, what do you all think about these valves? The price is right and RHS is a well known name in the business.

http://www.summitracing.com/parts/rhs-6046-8/overview/
http://www.summitracing.com/parts/rhs-6049-8/overview/

I am going to be running a cam on a 106 ICL so I have to take that into consideration on sizing as well. I just don't want to have to have new valve seats installed.