Allstar Flat Style Engine Pushrod Guide Plate for 5/16 inch Hardened Pushrod (Pack of 8) features engine pushrod guide plates. They have been designed for small block Chevy applications and designed to fit 5/16 inch hardened pushrods. The guide plates are a flat style and stabilize valvetrains using high lift camshafts and high pressure valve springs. The hardened pushrods are mandatory when using pushrod guide plates. They are sold as one set of 8 pieces and have been backed by a 90-day limited factory warranty.