AFR Mongoose 260CC LS3 CYLINDER HEAD

260cc LS3 Cylinder Head AFR’s 260cc LS3 "Mongoose" heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head available today. Featuring A356 aluminum castings, titanium retainers and the highest quality components, throughout. They’re designed for 4.000 or larger bore applications up to 454 CI, operating up to 7000 RPM. This product is street legal in 50 states from 2007 to 2016 emission controlled vehicles with a General Motors 6.2L LS engine. AFR heads are available bare (without parts), call our tech line for details.  Basic Package Components 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job  8mm Bead Lock Intake Valve, 2.165" x 5.200" Overall Valve Length AFR #7214 8mm Bead Lock Exhaust Valve, 1.600" x 5.205" Overall Valve Length AFR #7212 PAC Racing Spring 1.270" OD Hydraulic Roller Dual V