Brian Tooley Racing SK707 .685" Lift Dual Spring Kit w/ Titanium Retainers for 2014+ Gen V 5.3L 6.2L. 685" Lift Dual Spring Kit for LS engines using Limited stock rocker arm setups and Roller Rockers. Includes dual springs, matching titanium retainers, locators for stock guides, locks and seals. Spring specs: 170 lbs @ 1. 800", 380 lbs @ 1. 180", 450 lbs @ 1. 115, coil bind @ 1. 000" This is a drop in spring kit for LT1 L83 L86 engines. Note: This kit will not fit LT4 engines.

4L w/ VVT 2009+ applications

Good Low End Torque in the 1800-2600 RPM Range

this ZEX™- developed technology creates a pocket of intense low pressure just below the carburetor while the nitrous is being sprayed

FAST™ Anodized Billet Fuel Rail Kit (Premium Option)

self-learning fuel strategies and the proven

-This kit is balanced in house at AMS Racing

this is the one EFI system with the easy-to-use features and completely configurable capabilities that accurately balance fuel and spark

Black Oxide Hex

Note: Non-returnable item if opened

The full set of head bolts provide a secure fitment for your engine with high quality and durability for long-term performance assurance

Note: Custom Tuning is required

lobe separation: 106