862 LS Ported & Polish Cylinder Heads 4.8/5.3l/6.0l V8 Chevy Engines

Ported LS cylinder Head SET, Over sized Intake and exhaust valves Stainless steel valves, Dual valve springs We take the up most pride in our cylinder head remanufacturing as we hold tolerances and procedures that exceed OEM Standards. Our state of the art 3-D seat cutters provide an Accurate, Flow promoting, and efficient Sealing seat. CBN Head gasket sealing surface finish, Sunnen valve guide sizing tools, and proper valve spring rating system. -Shotpeened -Inspected and pressure tested \- Fully Professional Ported and polished Intake and exhaust Ports -212CC Intake Runner -Guide bosses ground down and sharpen -Rocker arm Hump removed from Intake runner\[Must seal intake rocker arm bolts with sealant\] -80 Grit surface finish on intake for fuel atomization -150 grit surface finish in exhaust for a smooth finish for air speed and reduced carbon build up -2.020 Stainless Steel Intake valves \[Factory is 1.890\] -30\* backcut on intake valves for improved flow -1.570 Stainless Steel Exhaust Valves \[Factory is 1.550\] -Valves are swirled polished for flow improvements and control -Competition multi-Angle valve job with state of the art 3/D seat cutters on up to date machines \- Intake and exhaust chamber deshrouded for flow -Guides are measured and inspected and replaced as need be Cast Iron OEM -Dual Spring Setup with a 1 piece valve seal/locator -New Chromoly Retainers -1.880 Installed height @ 145 Lbs Seat pressure -1.220 Open Height @ 375 Lbs Open pressure .660 Max Valve lift 1.130 coil bind -62.4cc Combustion Chamber -New Viton Valve seals -New hardened Valve locks -.008 Surfaced off each head at correct RA finish for MLS Head gaskets -All bolt holes chased and replaced as needed \- All gasket surfaces polished and deburred -Throughly washed and assembled with correct lubricants -Heads are kept in a clean area in bags ready to be bolted on out of the box!

• Brand: Chevrolet
• Type: Cylinder Head
• Manufacturer Warranty: 1 Year
• Manufacturer Part Number: 862
• Material: Aluminum
• Vintage Part: No
• Finish: Unfinished
• Performance Part: Yes