By far the most established member in the LS engine family, the LS7, has proven time and time again to be the prime choice of late model hot rodders worldwide. Send us your GM factory cores and allow us to sculpt our proven port configuration and build you a set-up that will dominate any street or track you choose to do battle on. ## 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 the rocker ratio to ensure accuracy. (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 LIFT .100" .200" .300" .400" .500" .600" .700" .800" Valve Size INTAKE 85 171 261 325 361 383 398 403 2.200" EXHAUST 63 117 162 208 246 266 279 285 1.615" *Flowed with radius inlet intake/no pipe exhaust Intake Volume (cc) 285 Rocker Config. GM LS7 8mm bolts Exhaust Volume (cc) 90 Intake Port Config. LS7 Valve Guide Material Manganese Bronze Head Bolts/ Cyl. 4 Minimum Bore Size (in) 4.125" Valve Angle (degrees) 12 LME Standard Head Porting Process Clean carbon from intake exhaust and chambers (used cores) Through inspection 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 CNC Heads, Parts: CHE Bronze Guides Reuse GM Titanium Intake valves, REV Stainless Severe Duty Exhaust Valves, LME .660" Lift Spring Kit w/ Titanium Retainers
