GM LS-series high performance hydraulic roller applications

Valve Spring Specs: p/n 660-221436-16

• Type of Spring: Polished Double Coil without Damper
• Color Code: N/A
• Installed Height and Pressure: 1.810' @ 155 lbs./in.
• Open Height and Pressure: 1.150' @ 405 lbs./in.
• Spring Rate: 379 lbs./in.
• O.D. of Outer Spring: 1.295'
• I.D. of Outer Spring: 0.949'
• I.D. of Middle Spring: N/A
• I.D. of Inner Spring: 0.676'
• Coil Bind height: 1.100'
• Weight: 93 grams
• Damper Included: No
  Click Here to see 660-221436 Valve Spring Load Chart

Valve Spring Retainer Specs: p/n 660-23621-16

• Street Master 7° Steel Retainers
• Works with 1.290' Spring O.D.
• Spring Type Design: Single/Double
• Retainer O.D.: 1.155'
• Retainer I.D. #1: 0.950'
• Retainer I.D. #2: 0.675"
• Retainer I.D. #3: N/A
• Installed Height: +.050"
• Keeper Degree: 7° x 8mm Valve Stem
• Weight: 17 Grams

I.D. Valve Spring Locators Specs: p/n 660-42334-16

• Fits Spring O.D.: 1.290" maximum
• Locator O.D.:1.270"
• Locator I.D.: 0.505"
• Locator Thickness: 0.035"
• Wall Shoulder Height: 0.145"
• Shoulder Diameter: 0.675"

Valve Lock Specs: p/n 660-13098-16

• Material: Machined Steel
• Lock Angle: 7°
• Valve Stem Diameter: 8mm (.3135')
• Installed Height: Standard
• Valve Stem Groove Type: Single Radius
• Weight: 2.6 grams

Valve Stem Seal Specs: p/n 660-24042-8 (x2)

• Material: Viton
• Valve Stem Diameter: 5/16" / 8mm
• Guide O.D.: 0.500"
• Installed Seal O.D.: 0.608"
• Cutter # Required (not included): p/n 660-41610