Valve Spring - 1300 Series Circle Track - Dual Spring - 670 lb/in Spring Rate - 1.150 in Coil Bind - 1.430 in OD - Set of 16
PAC Racing Springs delivers superior valvetrain stability and performance
Just ask the thousands of competitors who use PAC springs on top motorsports circuits—NHRA, NASCAR, NMRA, Formula 1, 24 Hours of LeMans, Sprint Car, IHBA Boat Racing, Baja 1000, and more
PAC Racing Springs valve springs, valve locks, lifters, and retainers are designed and forged with the latest technology
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