With the combined feature of having a rigid Brodix A-356 aluminum casting with LMEs own porting, the BR3 cylinder head is an excellent choice when looking to improve beyond the factory GM LS3 head. Standard attributes include precision CHE manganese guides with hollow stem intake and stainless exhaust valves. Steadfastness has never been so feasible for your LS3 headed power plant.
** By specifying your cam lift LME will assemble your cylinder heads with the proper spring installed height. This will result in optimal spring pressures and coil bind distance for maximum performance. Please include rocker ratio to ensure acuracy. (example: .650" lift with 1.8 ratio intake and exhaust)
All Cylinder Heads Are Priced As ASSEMBLED Pairs
FLOW NUMBERS WITH 4.125" BORE @ 28" WATER
*Flowed with radius inlet intake/no pipe exhaust
Intake Volume (cc)
GM LS3 8mm Pedestal or Crower Shaft Mnt.
Exhaust Volume (cc)
Intake Port Config.
Chamber Volume (cc)
Head Bolts/ Cyl.
Valve Guide Material
Valve Angle (degrees)
LME Standard Head Porting Process
Clean carbon from intake exhaust and chambers (used cores)
Debur sharp edges
Valve guide clearance measured and adjusted for application
CNC ported intake exhaust and chambers
Competition valve job
Valve job hand blended into ports
Combustion chambers measured and adjusted for application
Meticulous final cleaning of cylinder head and components
Intake valves back cut with optimal angle for application
Heads assembled and spring pressure set up for specific cam lifts/application