Standard 3-1/2″ bore. Kit to service one engine. With .045″ head (.046 starting thickness and .042″ final crush) and .030″ base gaskets (.031″ starting thickness and .025″ final crush). Complete with type ‘A’ (early) and type ‘B’ (late) style base gaskets. With o-rings as used for oil return on up to 2007 XL models.
