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205cc LS1 Aluminum Cylinder Head Flow Chart |  |
205cc Mongoose LS1 Street Cylinder Head Part Numbers CNC Ported Pairs of Heads Complete With Parts or Ready to Install
CNC Street Porting | Description | Part Number | | 205cc CNC Ported w/ parts 66cc | 1510 | | 205cc CNC Ported w/o parts 66cc | 1520 | | 200cc As Cast w/o parts 64cc | 1541 |
| Basic Package Components | Part # | 100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Radiused Valve Job | | | Intake Valve, 2.020" standard length | AFR #7207 | | Exhaust Valve, 1.600" staindard length | AFR #7228 | 1.290" OD Hydraulic Valve Spring with dampener,
135 lbs. on seat, .600: maximum lift | AFR #8017 | | 7° 1.250 Titanium Retainers | AFR #8512 | | 7° Valve Locks | AFR#9007 | | Valve Seals | AFR #6612 | | Spring Cup | AFR #8042 | | Intake Valve Seats | AFR #9059 | | Exhaust Valve Seats | AFR#9069 | | Bronze Valve Guides | AFR#9051 |
| Specifications, Features, and Optional Supporting Components |
| Head Torque | 11MM ARP 70ft. lbs. w/ Moly 8mm 23ft. lbs. w/ Moly | | Exhaust Port Gasket | GM#12558573/Fel-Pro #1440 AFR #6857 | | Intake Port Volume | 205cc | | Intake Valve Size | 2.020 | | Exhaust Port Volume | 84cc | | Head Gasket | Fel-Pro #1041, AFR #6847 | | Cometic | AFR #6846 | | Head Bolts & Studs | Standard ARP, AFR #6330, #6331 & #6332 | | Head Bolt Washers | Standard ARP, AFR #6328 & #6329 | | Jesel or TD Shaft Mount | | | Suggested Manifold | LS6 or FAST, TPIS | | Spark Plug Starting Range | AC 41-974 Platinum | | Combustion Chambers | 66cc or 76cc | | Spring Pocket 1.250 | | | Valve Spacing | Stock | | Rocker Arms | Stock | | Valve Angle | Stock | | Angle Mill (milling options available) | .008" per cc | | Flat Mill (milling options available) | .006" per cc |
Note: Milling head deck will affect flow numbers |
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