Performance LS 317 Casting Cylinder Heads

Description

Ported 317 LS cylinder heads
70cc combustion chambers
2in Intake valve 1.6 Exhaust Valve [Factory size]
.-007 surfaced at correct ra Finish
Full 3 angle Valve job
GM factory valves refaced, inspected and polished Intake and Exhaust
All bolt holes are chased and repaired if need be
Intake and exhaust guides are measured for wear and replaced as needed.
Full professional port and polish Intake and Exhaust
[these head will need the rocker arm bolts sealed at final assembly]
Fully and thoroughly washed, prepped, polished and assembled and lubricated.
BTR Beehive valve springs pn: SP011-16
GM Retainers and locks
New Michigan Motorsports Viton Valve seals
These heads can net a max valve lift of .620 safely
All machine work done at reputable shop!
Ready to bolt on! Kept in bags in clean area ready to ship