Products specifications

Block Height	9
Fitment	Engine Specific
Bore	4.155
CID	420
Comp Height	1.062
Comp Ratio @ 58cc	15.4:1
Comp Ratio @ 64cc	14.1:1
Comp Ratio @ 76cc	12.1:1
Dome Volume	8
Gram Weight	450
Oversize	0.03
Rod	6
Stroke	3.875