Description
AFR – Airflow Research 3350 – AFR Big Block Chevy 335cc Rectangle Port Magnum Aluminum Cylinder Heads Details
This is an unassembled bare cylinder head with valve guides and valve seats installed only. Does not include any parts such as valves, springs, spring components, studs or guideplates.
Big Block Chevy 335cc Rectangle port 24° Magnum Basic Package Components
| 100% CNC Ported Combustion Chambers | ||
| 100% CNC Ported Exhaust Ports | ||
| 100% CNC Ported Intake Ports | ||
| Competition 5-Angle Valve Job | ||
| Intake Valve Size – 2.300” (Valve not included) | ||
| Exhaust Valve Size – 1.880” (Valve not included) | ||
| 1.625” OD PAC Racing Solid Roller Valve Spring, 275 lbs. on seat, .850” maximum lift, max RPM 7400-7600 | ||
| 10º Manley 4140 Chrome Moly Retainers | ||
| 10º Valve Locks | ||
| 7/16” Rocker Studs | ||
| Adjustable 3/8” Guide Plates | ||
| Viton Valve Seals | ||
| Hardened Spring Seat | ||
| Intake Valve Seats | ||
| Exhaust Valve Seats | ||
| Bronze Valve Guides | ||
| Big Block Chevy 335cc Rectangle Port 24° Magnum Head Specifications | ||
| Head Torque w/Moly Lube | 75 Ft. Lbs. | |
| Rocker Stud Torque | 55 Ft. Lbs. | |
| Intake Port Gasket, 1.720” x 2.450” with 1/2” radius | Fel-Pro 1275 – DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket. | |
| Exhaust Port Gasket | AFR 6858 | |
| Head Gasket Mark IV | 4.540” Bore, Fel Pro 1017 AFR 6850 |
|
| Head Gasket Mark V – VI | Up to 4.500” Bore, Fel Pro 1047 | |
| Head Gasket Mark V – VI | 4.500” to 4.600” Bore, Fel Pro 17049 | |
| Head Bolts & Studs | Standard ARP | |
| Head Bolt Washers | Manley Standard | |
| Stud Girdle | AFR 6210 | |
| Suggested Manifold | Edelbrock 2907 & 2927 or Brodix HV2000 & HV2001 | |
| Spark Plug Starting Range | Champion C59C, Autolite 3932 | |
| Combustion Chambers | 121cc Fully CNC’d | |
| Intake Port Volume | 335cc Fully Ported | |
| Exhaust Port Volume | N/A | |
| Spring Pocket can be cut to 1.750, no deeper. | ||
| Valve Spacing | Standard | |
| Rocker Arms | Standard | |
| Valve Angle | 24° / 4° Intake ; 15° / 4° Exhaust | |
| Angle Mill, 104cc Maximum | .009” per cc | |
| Flat Mill, As Cast 108cc, CNC 114cc Maximum | .006” per cc | |
| NOTE: | Flat and Angle mills might require a .120” thick head gasket. | |
