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Competition Products "Pro-Alloy" Roller Valve Spring Package (1.550" Dia.)
Specially developed low stress, high endurance mechanical roller valve springs for up to .750" lift. Install height is 1.880" giving you 230 lbs. of seat pressure and 550 lbs. open. Includes #98643 Howards "Pro-Alloy" springs, #3650 10 degree titanium retainers and #4438 3/8" 10 degree VTO "forged" steel locks (single groove). Free VTO Seals!
Valve Spring Part Number: 98643
Spring Style: Dual
Spring Diameter: 1.540
Seat Press: 230 @ 1.880
Open Press: 550 @ 1.250
Max Lift: .750
Spring Quantity: Set of 16
Retainer Part Number: 3650
Retainer Material: Titanium
Retainer Quantity: Set of 16
Valve Lock Part Number: 4438
Valve Lock Degree: 10 Degree
Valve Lock Material: Alloy Steel
Valve Lock Quantity: Set of 32 (16 Pair)
Valve Stem Seals: Included
Valve Stem Seal Type: VTO Ultimate Duty
Manufacturer: Competition Products
Manufacturer's Part Number: VSA9-38T
Packaged Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Kit
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