Allstar ALL90250 Flat Style Engine Pushrod Guide Plate for 5/16" Hardened Pushrod, (Pack of 8) Engine pushrod guide plates are for small block Chevy applications and designed to fit 5/16 inch hardened pushrods The guide plates are a raised style Guide plates stabilize valvetrains using high lift camshafts and high pressure valve springs Hardened pushrods are mandatory when using pushrod guide plates Sold as one set of 8 pieces