BTR PLATINUM PLUS .685" LIFT SPRING KIT WITH TITANIUM RETAINERS - GEN V LT - STOCK GUIDES - SK707/0560/BB

BTR PLATINUM PLUS .685" LIFT SPRING KIT WITH TITANIUM RETAINERS - GEN V LT - STOCK GUIDES - SK707/0560/BB

Unlock the absolute maximum potential of your high-RPM hydraulic roller setup with the BTR Platinum Plus .685" Lift Spring Kit with Titanium Retainers (SK707/0560/BB). When you decide to take a walk on the wild side and exceed the .660” limit of our popular Platinum Spring Kit, the next step is our .685” Spring Kit. Purpose-built by Brian Tooley Racing, this premium dual valve spring kit is the ultimate drop-in valvetrain solution for high-lift, radical camshaft profiles targeting the northern boundaries of the RPM range.

Key Features

• Massive .685" Lift Capacity: Designed specifically for serious performance engine builds that demand reliable control past standard .660" lift limitations.
• Ultra-Lightweight Titanium Retainers: Includes premium BTR Titanium Retainers engineered to minimize valvetrain mass, significantly increasing frequency stability and resisting high RPM valve float.
• Machined for Stock Valve Guides: Features specialized valve spring locators precisely designed to slip over OEM powdered-metal valve guides with a perfect fit.
• Complete Turnkey Kit: Comes fully loaded with 16 dual valve springs, matching titanium retainers, locators, valve locks, and premium valve seals to outfit your complete cylinder head rebuild.

 
Spring Specifications

• Seat Pressure: 170 lbs @ 1.800"
• Open Pressure: 380 lbs @ 1.180" / 450 lbs @ 1.115"
• Coil Bind: 1.000"

Kit Includes

• SP010 - .685" Lift Platinum Plus Dual Valve Springs (x16)
• SR008 - Titanium Retainers for LT1 (x16)
• SL505060 Spring Locators - 0.505" ID, .060" Thickness (x16)
• VS LS KIT - Valve Seal Kit (x16)
• VL7°8MM - 7 Degree Standard Height Valve Lock (x32)

Ideal Applications
This drop-in premium kit is specifically optimized for GM Gen V LT engines (such as the LT1, L83, and L86—note that it does not fit LT4 applications) that have OEM powdered metal valve guides. It seamlessly accommodates limited stock rocker arm setups or aftermarket roller rockers, delivering the ultimate valvetrain safety buffer your aggressive high-horsepower motor demands.