BLOX Racing valve springs are wound using super clean, chrome silicone alloy. These valve springs are designed and engineered for both high performance street driving and all-out racing conditions. Each set provides maximum lift while preventing valve float and helps counter the effects of spring surge. These are perfect for naturally-aspirated and forced-induction engines. Easy installation, no machining is required. Highly recommended for aftermarket, performance camshafts. For maximum results, use with BLOX Racing Ti retainers and high compression valves. Set includes 16-piece valve springs. Vehicle & Engine Applications: 93-96 Prelude Si VTEC (H22A1) & JDM Variant (H22A) 97-01 Prelude VTEC Base & Type-S (H22A4) JDM H23A VTEC JDM H22A/A7 Euro Accord Type-R JDM H22A Prelude Type-S / S-Type JDM F20B VTEC Accord SiR Technical Data Sheet