01-02-2021, 04:13 PM

Adecco

Senior Chief

Join Date: Nov 2004

Location: River Grove Illinois

Posts: 439

RA4 intake valve's in a 6x4 head

I have a set of titanium RA4 intake valve's and I want to install them in place of a stock intake valve on a 6x4 head. I was told they would work, have to be shimmed because they are longer than stock 6x4 intake valve's. So the question is can they be lathe cut and re-groved for the valve spring lock, or am I better off just shimming them..

Also any input on upgrades to springs both intake and exhaust. .looking to run a .540 lift roller cam

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