Ferrea GM LS1 Pro PAC Alloy Dual Valve Spring | Multiple Fitments (S99100) Ferrea Racing

GM LS1 PAC Alloy Dual Valve Spring by Ferrea

Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear.

Ferrea Valve Springs are developed from high strength alloys, including premium grade chrome silicon steel. These springs are manufactured with state-of-the-art equipment. Our springs are heat-treated and stress relieved, which dramatically increases the spring’s life. Strict quality control procedures and cycle testing ensures consistency from batch to batch. Ferrea Valve Springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today€™s aggressive valvetrain combinations.

Please Note: This Spring requires Ferrea Titanium Retainer # E12000 and Ferrea Spring Seat Locator # SL1036

Features

• Type/Material/Application: Dual Spring. Pro PAC Alloy/Endurance Application
• Outside Diameter: 0.925/1.275
• Inside Diameter: 0.650/0.925
• Seat Press.: 150 lbs @ 1.800
• Open Press: 475 lbs @ 1.100
• Rate Inch: 464 lbs
• Coil Bind: 1.030″
• Max Net Lift: .700″

Benefits

• Reduce valvetrain component wear
• Provide the stability needed for high lift, high rpm racing engines
• Helps minimize the load loss for today€™s aggressive valvetrain combinations

Applications

• 1997-2004 Chevrolet Corvette C5
• 1998-2002 Pontiac Firebird Formula, Trans Am
• 1998-2002 Chevrolet Camaro Z28
• 1998-2002 Chevrolet Camaro SS
• 2004 Pontiac GTO/Holden Monaro

What’s In The Box?

• 1 – Valve Spring

Warranty

• No Warranty