NismoC32 Posted August 8, 2015 Share Posted August 8, 2015 (edited) I have a P90a head (Solid lifters) I want to upgrade with larger valves I have found out that I can increase the size by 1mm on the inlet valve and 1,5mm on the exhaust valve without having to change the valve seats. So the question is where can I by oversize valves ? UPDATE: I have found these valves for my engine: http://datsunspirit.com/shop/dsi-big-valves/ But the stem length is to long for my use, needs to be original length. Other than that they would have been perfect. and http://www.ferrea.com Wish thay had 1,5mm exh. valves Anyplase else that I should check out ? Edited August 17, 2015 by NismoC32 Quote Link to comment Share on other sites More sharing options...
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