This listing is for set of eight (8) hyper-eutectic pistons flat top 4VR pistons and a (Hastings/Perfect Circle/MAHLE) moly piston ring set compatible replacements for Ford 289ci and 302ci (5.0L) V-8 engines. These are stock replacement pistons for 1965-68 289ci engines and 1977-86 302ci (5.0L) engines. Piston specifications are as follows: BORE: 4.000" (at +.STD") HEAD TYPE: Flat head w/4-valve reliefs - 8.2:1 CR w/64cc chambers RING LANDS: 5/64"-5/64"-3/16" COMP. DISTANCE: 1.585" PIN DIAMETER: .912"; press-fit. Your choice of Over sizes, just click the oversize box needed and add to your cart.