DPG Posted March 16, 2012 Share Posted March 16, 2012 I have a set of 45mm intake valves that but am unsure if I should go with a 35mm exhaust valve, or the 38mm exhaust valve from Arizona Z Car. Has any one done this 45/38 set up on a head before and seen positive results? I will be installing these on an E31 head that will go on an L28 block bored .040 over, with flat top pistons. Thanks for any help guys! -David Quote Link to comment Share on other sites More sharing options...
DPG Posted March 20, 2012 Author Share Posted March 20, 2012 (edited) No one has run this set up before? The E31 will be fully built with stage 4ish cam revving to 7500. Edited March 20, 2012 by DPG Quote Link to comment Share on other sites More sharing options...
clarkspeed Posted March 20, 2012 Share Posted March 20, 2012 Better check valve/wall clearance. I'm not sure those will fit into l28 040 over. Quote Link to comment Share on other sites More sharing options...
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