Pro Elite GM LS3 CNC-Port 6-Bolt Aluminum Cylinder Head - Assembled w/ .700" Lift Springs & Titanium Int./Inconel Exh. Valves

  • This Pro Elite™ CNC-Port 6-Bolt LS3 Cylinder Head is ideal for high horsepower and boosted LS3 builds and uses the popular 6-bolt design. Assembled head includes: #54550 Cylinder head, #943 dual valve springs, #1731 tool steel retainers,#632 valve locks, #511 valve seals, #4874 spring seats, #6083 titanium intake valves,#6084 Inconel exhaust valves.
In stock

Pro Elite#153 CNC-Port 6-Bolt Cylinder Heads for GM LS3 Engines use the LS 6-bolt head design, making them compatible with the RHS® LS Race Block, GM LSX Block and OEM 4-bolt blocks.

  • Increased clamping capacity over standard 4-bolt design improves head gasket retention
  • CNC-machined intake & exhaust runners as well as combustion chambers increase flow capability
  • .700” Lift dual valve spring assembly allows for higher lift cams and increased RPM
  • Designed for high horsepower and boosted GM LS3 applications

All RHS® cylinder heads feature patented Clean Cast Technology™, a revolutionary process that eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow. These benefits provide more power and cooling, right out of the box.