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Vehicle Info NeededPAC RACING SPRINGSPART NUMBER: 278-1222X-16
1222X-16 RPM Series Dual Valve Springs for GM Gen III/IV LS
$39480
Ships on 10/26/2026
Lowest Price GuaranteeRPM Series Dual Valve SpringsGM Gen III/IV LS 1.280 in. Outside Diameter Spring Rate: 425 lb./in. 0.655 in. Inside Diameter Set of 16
PAC Racing Springs 1222X-16 RPM Series Dual Valve Springs Features:
- Maximum Valve Lift: 0.700 in.
- Retainers Included: No
- Coil Bind Height: 1.055 in.
- Damper Spring Included: No
- Spring Rate: 425 lbs./in.
- Inside Diameter of Outer Spring: 0.925 in.
- Locks Included: No
- Valve Stem Seals Included: No
- Valve Springs Coated: No
- Installed Height: 1.800 in.
- Seat Pressure at Installed Height: 180 lbs.
- Open Height: 1.100 in.
- Open Pressure: 480 lbs.
High-RPM Valve Control Built for Consistent Performance
PAC Racing Springs RPM Series Dual Valve Springs are engineered to deliver precise valvetrain control and stability in high-performance and elevated RPM applications, backed by PAC Racing Springs’ advanced spring technology and manufacturing expertise. Designed with dual-spring construction and premium materials, these springs provide enhanced load control, reduced valve float, and improved durability under demanding conditions. With a focus on consistent performance, fatigue resistance, and fitment accuracy, PAC Racing Springs RPM Series deliver reliable operation and long-term confidence for builders seeking dependable valvetrain performance in street, strip, and racing environments.
Part TypeValve Spring
Product LinePAC Racing Springs RPM Series Dual Valve Springs
BrandPAC RACING SPRINGS
Package Height3.5
Package Width4.0
Package Length15.2
Weight3.86 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberPAC-1222X-16
Package Qty1
Package TypeEA
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