roccodart440
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- Apr 19, 2010
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NGK seems to have two heat ranges for the 440, a (4) and a (5).
They are the XR4 and the XR5.
Anyone have any experience with these or any recommendations?
Engine is a 440, 602hp 10.5:1, [email protected], .650, 112LSA, eddy RPm heads
They are the XR4 and the XR5.
Anyone have any experience with these or any recommendations?
Engine is a 440, 602hp 10.5:1, [email protected], .650, 112LSA, eddy RPm heads