PAC-1218X-16 Top 0.650 in. / Bottom 0.885 in. ID – Top 1.055 in. / Bottom 1.290 in. OD – 1.800 in. installed Height – 0.600 in. Max Valve Lift

Top 0.650 in. / Bottom 0.885 in. ID – Top 1.055 in. / Bottom 1.290 in. OD – 1.800 in. installed Height – 0.600 in. Max Valve Lift PAC Racing’s 1200 Series Ovate Wire Beehive Valve Springs are a budget-minded spring designed for the rigors of street driving with occasional track days in the mix. This is the perfect spring for your street/strip terror. Applications include Ford 2V Mod Motor, GM Gen III/IV LS, Big Block Chevy, Ford 4V Mod Motor, Ford 3V Mod Motor, Chrysler Gen III Hemi, Viper SRT-10, and Small Block Chevy. Built using our signature PACaloy super clean wire to ensure strength and durability In-house heat-treating for precise spring rates and increased strength Multi-peen process to optimize service life Polishing to improve operating cycles Nano-Peen™ proprietary surface treatment Outer Diameter – Outer Valve Spring Top 1.055 IN / Bottom 1.290 IN Inner Diameter – Outer Valve Spring Top 0.650 IN / Bottom 0.885 IN Installed Height 1.800 IN Installed Load 130 PS Installed Load / Height (Valve Closed) 130 LB @ 1.800 IN Open Load 318 PS Open Load / Height (Valve Open) 318 LB @ 1.200 IN Valve Spring Rate 313 PS Max Coil Bind 1.140 IN Max Valve Lift 0.600 IN Recommended Valve Spring Retainer – 300 Series R310, R311, R363 Recommended Valve Spring Retainer – 500 Series R510, R511 Recommended Valve Spring Seat S111 Valve Spring Series RPM Series Valve Spring Type Ovate Wire Beehive Primary Market Circle Track|Street Performance