This is Brian Tooley Racing's LS3 shaft rocker conversion kit in unassembled form. It replaces the factory pedestal-mount rocker setup with a billet steel shaft-mount stand system to reduce valvetrain deflection. The stand carries four shafts per cylinder head, made from genuine 52100 bearing steel, with five fasteners mounting each pair of rockers to the stand versus the traditional single bolt per rocker. BTR tested both aluminum and steel stands during development and settled on steel. This version ships as a kit only, without rocker arms installed; fitment should be checked against aftermarket cylinder heads before assembly.
- Part Number: BTRSRKR3KIT
- Application: GM LS3 (stock LS3 heads)
- Configuration: Unassembled kit (no BTR rocker arms included)
- Includes: 2 shaft rocker stands, 8 shafts, 24 rocker stand bolts, 34 thrust shims (.047in thick), 1 trunnion bearing kit (33 bearings)
- Material: Steel, natural finish; shafts are 52100 bearing steel
FAQ
Does this kit include rocker arms?
No. This is the unassembled shaft rocker kit only; it does not include BTR rocker arms. An assembled version with BTR rocker arms installed is also available.
What is included in the unassembled shaft rocker kit?
Per BTR's kit contents, it includes two shaft rocker stands, eight shafts, 24 rocker stand bolts, 34 thrust shims (.047in thick), and a trunnion bearing kit of 33 bearings.
Why use a shaft rocker system instead of pedestal-mount rockers?
The shaft-mount design uses five fasteners per pair of rockers instead of the factory's single-bolt-per-rocker mounting, reducing valvetrain deflection compared to stock pedestal-mount rockers and improving performance and durability.
Will this kit fit aftermarket cylinder heads?
This version is built for stock LS3 heads; BTR advises checking fitment against your aftermarket cylinder head before assembly, and offers separate kit variants for AFR/TFS and Frankenstein M311 LS3 heads.
