CHE LS1 Shaft-Mount Trunnion Kit (CHE-3720-SM) with Rocker Arm Bolts | Fits Cathedral-Port GM LS Engines 4.8L 5.3L 5.7L 6.0L | LS1 LS2 LS6 LQ4 LQ9 L33 LC9

Enhance valvetrain stability in your cathedral-port LS build with the CHE LS1 Shaft-Mount Trunnion Kit (CHE‑3430‑SM), now bundled with essential rocker arm bolts for a complete, high-strength upgrade. Specifically made for 4.8L, 5.3L, 5.7L, and 6.0L cathedral-port heads (LS1, LS2, LS6, LQ4, LQ9, L33, LC9), this kit replaces the pedestal-rocker setup with a rigid shaft-mounted system. Included are eight steel shafts, 32 floating bronze bushings, 33 snap rings, and precision rocker bolts. The conversion dramatically reduces lateral deflection, isolates cylinder harmonics, and boosts valve timing control under high RPM, aggressive cam profiles, or boosted applications. Machined to OEM tolerances, this kit ensures durability and performance without compromising fitment—rocker arms are not included.

• Full Shaft-Mount System with Bolts – Convert from pedestal rockers using eight hardened shafts, 32 floating bushings, 33 snap rings, plus torque-specified rocker arm bolts for a secure installation that locks down your valvetrain.
• Premium Valvetrain Stability – Shaft-mount design resists deflection and harmonics during high-RPM or high-load operation, delivering precise valve timing and improved engine response.
• Designed for Cathedral-Port LS Engines – Fits GM heads from 1997–2013 including LS1, LS2, LS6, LQ4, LQ9, L33, LC9 (4.8–6.0L). Not compatible with rectangle-port or Gen V LT heads.
• Floating Bronze Bushing Design – Dual bushings per shaft allow independent movement, reducing wear and improving durability under aggressive cam and valve spring combos.
• Built for Extreme Environments – CNC-machined components crafted for race, street/strip, and heavily boosted use, delivering long-term reliability in demanding conditions.