SLP is proud to re-release our 1.85-ratio rocker arm package for GM "Gen III" engines which includes LS1, LS6, LS2 as well as 4.8, 5.3 and 6.0* (LQ4 OR LQ9) liter truck engines. Designed as a true bolt-on replacement, these new rockers require NO valve cover or cylinder head modifications (please reference our instructions for proper installation). SLP's exclusive design is based off of the stock rocker providing an OEM quality steel construction and a roller bearing trunion which results in a 10% increase in valve lift over the stock 1.7 ratio rocker arms and gains of up to 12 horsepower over stock. This package includes 16 rocker arms, detailed instructions and all required installation hardware. 

This package includes:

• 1.85 Ratio Rocker Arms 16 qty (50185)
• New bolts 16 qty

NOTE 1: When using an aftermarket camshaft, please contact SLP for proper compatibility. 

NOTE 2: LS1, LS6 and LS2 engines may require 38-53002 or 38-53003 springs, 38-53103 or 38-53104 retainers and part 38-66345 keepers. Please reference chart below for proper application and part 38-51185 or part 38-51186 rocker arm package when purchasing the complete package. 

SLP ROCKER-ARM COMPATIBILITY CHART (with stock camshafts) 

Year	Application	Requires SLP Springs & Retainers	Suggest Spring	Intake Valve Lift	Exhaust Valve Lift
2005-07	C6 Corvette	Yes	53003	.600	.596
2002-04	Z06 Corvette	Yes	53003	.600	.596
2001	Z06 Corvette	Yes	53003	.569	.568
2001-04	Corvette	No	N/A	.505	.521
2000	Corvette	Yes	53002	.544	.544
1997-99	Corvette	No	N/A	.514	.521
2001-02	F-Body	No	N/A	.505	.521
1998-00	F-Body	Yes	53002	.544	.544
2005-06	GTO	Yes	53003	.600	.596
2004	GTO	No	N/A	.505	.521
2006	CTS V	Yes	53003	.600	.596
2004-05	CTS V	Yes	53003	.600	.596
2005-06	SSR Truck	Yes	53003	.566	.564
2006-07	Trailblazer SS	Yes	53003	.600	.596
2001-07	CK Truck	No	N/A	.505	.521
1999-07	CK Truck	No	N/A	.497	.507
1999-00	CK Truck	No	N/A	.497	.507
2003-04	ST Truck	No	N/A	.497	.507
2002-05	CK Truck	No	N/A	.497	.507