The Texas Speed 1.8 Adjustable Shaft Mount Roller Rocker Package for Cathedral Heads is a high-ratio shaft-mounted rocker set for LS engines with cathedral-port cylinder heads. The rockers are machined from 17-4 stainless steel with CHE bronze trunnions, roller tips and swedged roller pins, and the design is Spintron tested by Texas Speed. The set bolts to the factory rocker pedestals and is sold as a complete set.
The 1.8 ratio gives more valve lift from the same camshaft lobe than the 1.7 version, and the shaft mount keeps the rockers aligned under the spring loads of a solid roller or high-lift hydraulic roller combination, which is why Texas Speed recommends the package for solid roller camshaft applications. Texas Speed tall valve covers are required, stock valve covers will not fit, and minor trimming near the valve cover rail may be needed depending on the cylinder head casting.
Specifications
- Rocker ratio: 1.8, adjustable
- Mount type: Shaft mount, fits factory rocker pedestals
- Material: 17-4 stainless steel
- Trunnions: CHE bronze
- Tip: Roller tip, reduces valve tip wear
- Roller pins: Swedged for durability
- Testing: Spintron tested by Texas Speed
- Application per Texas Speed: GM LS cathedral-port cylinder heads; fitment list also names LS3 and 260 base heads
- Recommended for: Solid roller camshaft applications
- Included: Sold as a complete set
- Valve covers: Texas Speed tall valve covers required; stock valve covers will not fit
Kit Includes
- Complete 1.8 adjustable shaft mount roller rocker set
Note: Requires Texas Speed tall valve covers; stock valve covers will not fit. Minor trimming near the valve cover rail may be required depending on the cylinder head casting. Verify valve cover and cylinder head clearance before installation.
FAQ
What heads does the Texas Speed 1.8 adjustable cathedral shaft mount rocker package fit?
Texas Speed lists it for GM LS cathedral-port cylinder heads, the design on the LS1, LS2, LS6 and Gen III and Gen IV truck engines, and its fitment list also names LS3 and 260 base heads. The rockers mount on the factory rocker pedestals.
What is the difference between the 1.7 and 1.8 Texas Speed cathedral rocker packages?
Both are 17-4 stainless adjustable shaft mount rockers with CHE bronze trunnions and roller tips for cathedral-port heads. The 1.8 ratio produces more valve lift from the same camshaft than the 1.7, so spring, retainer and piston-to-valve clearance should be checked for the added lift.
Will stock valve covers fit over the 1.8 shaft mount rockers?
No. Texas Speed states stock valve covers will not fit. Texas Speed tall valve covers are required, and minor trimming near the valve cover rail may be needed depending on the head casting.
Are the 1.8 cathedral rockers for solid roller camshafts?
Texas Speed recommends the package for solid roller camshaft applications, where the adjustable rockers set valve lash and the shaft mount provides the stability needed at high rpm.
How are the Texas Speed 1.8 cathedral rockers sold?
They are sold as a complete set for the engine, with 17-4 stainless rocker bodies, CHE bronze trunnions, roller tips and swedged roller pins, Spintron tested by Texas Speed.
