Product Description
Harland Sharp LS1 & LS6 Adjustable Roller Rocker Arms 1.7:1 Ratio
Fits 1997-2013 LS-based 4.8L, 5.3L, 5.7L, and 1999-2006 6.0L engines. Compatible with LS1, LS2, LS6, LR4, L20, LY2, LM7, LC9, LM4, LS4, L33, L59, LH6, LY5, LMG, LMF, LQ4, LQ9
Harland Sharp adjustable rocker arms are designed for GM Gen III/IV LS engines with cathedral port heads, providing precise valvetrain control and improved durability for both street and performance applications. Featuring a 1.7:1 ratio, these pedestal mount rocker arms maintain the factory LS ratio while offering the benefits of an adjustable, roller-style design.
Manufactured in the USA from high-strength aluminum, each rocker arm is CNC-machined for accuracy and equipped with a needle-bearing fulcrum to reduce friction and wear. The adjustable design allows for proper valve lash and preload setup, making them an excellent choice for camshaft upgrades or performance-oriented builds.
Features:
- Designed for GM Gen III/IV LS engines with Cathedral Port Cylinder Heads
- Pedestal mount design maintains proper rocker alignment
- 1.7:1 rocker arm ratio
- Adjustable design for accurate valve lash/preload
- Paired rocker arms connected by a centered tie-bar to maintain proper alignment
- Requires: Valve cover spacer or taller valve cover (they do require some clearance work on the head)
- Requires: .200 shorter pushrod for proper installation (recommend to check for proper pushrod length and preload)
- Includes all 8mm grade eight socket head cap screws and pedestals
- Roller tip design to reduce valve stem wear
- CNC-machined high-strength aluminum construction
- Needle-bearing fulcrum for reduced friction and wear
- Improves valve train stability and durability
- Made in the USA
Special Notes:
Adjustable pedestal mount, GM LS1/LS6 roller rockers are not designed to be a replacement for the factory rocker system.
Harland Sharp recommends soaking the rocker arms overnight in a zinc-based oil prior to installation to ensure proper initial lubrication.
