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Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98643 Springs, Dual, 1.550 in. Outside Diameter, 508 lbs./in. Rate, 1.080 in. Coil Bind Height, Set of 16

SKU: HRS98643

Valve Springs

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98643 Springs, Dual, 1.550 in. Outside Diameter, 508 lbs./in. Rate, 1.080 in. Coil Bind Height, Set of 16

SKU: HRS98643

Valve Springs
A$618.95
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Howards Cams' Pro-Alloy is a specially developed low-stress, high-endurance material. Years of development, experience, and testing have gone into creating these Pro-Alloy mechanical roller valve springs. They have a low fatigue rate compared to most other roller springs on the market. These springs exceed H-11 Vasco-Jet specifications and are cycle-tested to 12 million cycles with no breakage.

Part Type

1.550 Dual Valve Springs

Data: v4.2 - Upd: 2026-10-22 02:06:12

Specifications

Product Attributes - Brand
Howards Cams
Product Attributes - Manufacturer's Part Number
98643
Product Attributes - Part Type
Valve Springs
Product Attributes - Product Line
Howards Cams Pro-Alloy Mechanical Roller Valve Springs
Product Attributes - UPC
840793126026
Product Attributes - Valve Spring Style
Standard
Product Attributes - Number of Springs Per Valve
Dual
Product Attributes - Maximum Valve Lift (in.)
0.750 in.
Product Attributes - Retainers Included
No
Product Attributes - Outside Diameter of Outer Spring (in.)
1.550 in.
Product Attributes - Coil Bind Height (in.)
1.080 in.
Product Attributes - Damper Spring Included
No
Product Attributes - Spring Rate (lbs./in.)
508 lbs./in.
Product Attributes - Inside Diameter of Inner Spring (in.)
0.815 in.
Product Attributes - Locks Included
No
Product Attributes - Valve Stem Seals Included
No
Product Attributes - Valve Springs Coated
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 16.

Reference Information

Brand Name/s Howards Cams
StreetFX SKU hrs98643
SFX Item ID 5098985
Supplier Item Code 5098985
Manufacturer SKU 98643
Manufacturer UPC 840793126026
Alternative References HRC98643

Compatibility

Application Data
  • Installed Height (in.)1.880 in.
    Seat Pressure at Installed Height (lbs.)230 lbs.
    Open Height (in.)(application)1.250
    Open Pressure (lbs.)550 lbs.

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