PAC Racing PAC-1231X-16 RPM Ford 5.4L GT500/Cobra Jet Valve Springs 1.083 OD

PAC Racing designed these PAC-1231X-16 Valve Springs for Ford 5.4L GT500 and Cobra Jet high lift exhaust applications. These RPM Series Ovate Wire Beehive springs are manufactured from a premium alloy that outperforms automotive industry standards. PAC Racing processes these springs to aerospace shot-peening standards to allow for superior fatigue performance.

PAC Racing's proprietary process ensures that these valve springs will withstand the rigors of street performance and mild racing applications.

PAC Racing PAC-1231X-16 Valve Springs Specs:

• Number of Springs Per Valve: Single
• Valve Spring Style: Beehive
• Maximum Valve Lift: 0.550 in.
• Outside Diameter of Outer Spring: 1.083 in.
• Inside Diameter of Outer Spring: 0.636/0.720 in.
• Installed Height: 1.575 in.
• Coil Bind Height: 0.952 in.
• Spring Rate: 291 lbs./in.
• Spring Open Height: 1.025 in.
• Spring Open Load: 280 lbs.
• Load At Installed Height: 120 lbs.
• Damper Spring Included: No
• Retainers Included: No
• Valve Springs Coated: No
• Valve Stem Seals Included: No
• Locks Included: No
• Quantity: Sold as a set of 16

PAC: The World’s Premier Valve Spring Manufacturer!