This is Brian Tooley Racing's shaft rocker conversion kit for GM LS1/LS2 engines 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 securing each pair of rockers to the stand versus the factory's single bolt per rocker; BTR tested both aluminum and steel stands during development and selected steel. This version ships as a kit only, without rocker arms installed; fitment should be checked against aftermarket cylinder heads before assembly.
- Part Number: BTRSRKR1KIT
- Application: GM LS1, LS2
- Configuration: Unassembled kit (no BTR rocker arms included)
- Includes: Billet steel shaft rocker stands (x2), shafts (x8, 52100 bearing steel), mounting bolts (x34), thrust shims (x24, .047in thick), trunnion bearing kit (x1, 33 bearings)
- Material: Steel, natural finish
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 billet steel shaft rocker stands, eight 52100 bearing-steel shafts, 34 mounting bolts, 24 thrust shims (.047in thick), and a trunnion bearing kit of 33 bearings.
Why use a shaft rocker system instead of pedestal-mount rockers?
Each pair of rockers is secured to the shaft stand with five fasteners, versus the factory's single bolt per rocker, reducing valvetrain deflection compared to stock pedestal-mount rockers and improving performance and durability.
Will this kit fit aftermarket cylinder heads?
Fitment should be checked against your aftermarket cylinder head before assembly.
