The Texas Speed Steel Adjustable LS3/L99/L92/LSA/LS9 1.7 Ratio Roller Rocker Package gives rectangular-port LS engines a fully adjustable rocker arm that still bolts to the factory pedestals. The rockers are manufactured from 17-4 stainless steel with swedged roller pins and are Spintron tested, and the set is sold complete for one engine.
The 1.7 ratio keeps valve lift at the camshaft's rated figure while the adjusters allow precise lash setting, which is why Texas Speed recommends the package for solid roller camshaft applications. Texas Speed lists fitment for GM LS3, L99, L92, LSA and LS9 cylinder heads as well as 260 base cylinder heads. Factory valve covers will not fit over the adjustable rockers, so TSP tall valve covers are required, and minor head trimming may be needed depending on casting variation.
Specifications
- Rocker ratio: 1.7:1
- Type: Adjustable roller rocker arms, bolt to factory pedestals
- Material: 17-4 stainless steel
- Roller pins: Swedged for added durability
- Fitment: GM LS3, L99, L92, LSA and LS9 cylinder heads; 260 base cylinder heads
- Recommended use: Solid roller camshaft applications
- Testing: Spintron tested
- Quantity: Sold as a complete set
- Valve covers: TSP tall valve covers required; factory covers will not fit
Note: Requires TSP tall valve covers; factory valve covers will not fit.
Note: Minor cylinder head trimming may be required depending on casting variation.
Note: Verify valve cover and cylinder head clearance before installation.
FAQ
Which cylinder heads do the Texas Speed adjustable 1.7 LS3 rockers fit?
Texas Speed lists this adjustable 1.7 ratio roller rocker package for GM LS3, L99, L92, LSA and LS9 rectangular-port cylinder heads, and for 260 base cylinder heads. The rockers mount to the factory rocker pedestals.
Do I need different valve covers with these rockers?
Yes. Factory valve covers will not fit over the adjustable rockers. Texas Speed requires its TSP tall valve covers with this package.
Are these rockers intended for solid roller camshafts?
Texas Speed recommends the adjustable rocker package for solid roller camshaft applications, where the adjuster is used to set valve lash accurately.
What is the difference between the 1.7 and 1.8 ratio LS3 rocker packages?
The 1.7 ratio matches the factory LS3 rocker ratio so valve lift equals the camshaft's advertised lift. The 1.8 ratio version increases valve lift and effective duration for the same lobe, which adds power potential but requires rechecking spring and piston-to-valve clearance.
What are the rockers made from?
The rocker bodies are 17-4 stainless steel with swedged roller pins, and Texas Speed Spintron tests them to verify valvetrain control at speed.
