LS .660" Dual Valve Spring Kit Steel Retainers 4.8 5.3 6.0 LS1 LS2 LS3 SK001 USA Engine Mounts power loss

power loss

KEY PERFORMANCE FACTORS Rounded-Off Hex Head Bolts are a Thing of the Past

***Return Line is designed for the OEM Fuel pressure regulator or rail mounted regulators only

"Vietnamese"

Works excellent for high-horsepower

LS .660" Dual Valve Spring Kit Steel Retainers 4.8 5.3 6.0 LS1 LS2 LS3 SK001 USA Engine Mounts power loss. 660" Dual Valve Spring Kit Steel Retainers 4. 8 5. 3 6. 0 LS1 LS2 LS3 . 660" Lift Dual Spring Kit for LS engines using stock rocker arms. Kits ship standard with dual polished springs, locks and the following: Chromoly Steel Retainers Locators for Stock Guides (. 505" ID . 060" Thick) Black Valve Seals Spring specs are 155 lbs @ 1. 780", 380 lbs @ 1. 180", 400 lbs @ 1. 130, coil bind @ 1. 070" This is a drop in spring kit for all 15 degree LS heads