.200" longer (5.530") than stock. Stock length is 5.330". Crankcases must be bored to accept the larger diameter cylinder. A longer than stock length is typically used in combination with stroker flywheels. Note: Cylinders must be finish bored and honed to fit stock size pistons. Cylinders are sold without pistons and rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components, prior to installation. It is of importance that a knowledgeable mechanic will install & make adjustments as required.