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Vehicle Info Needed3610-1 265cc Oval Port 24 Degree Magnum Street Aluminum Cylinder Heads Big Block Chevy
Ships on 03/01/2027
Lowest Price Guarantee- 265cc Oval Port 24 Degree Magnum Street Aluminum Cylinder Heads
- Big Block Chevy
- 113cc Combustion Chambers
- 1.550 in. Hydraulic Roller Dual Valve Spring
- Assembled
- Pair
Big Block Chevy 265cc Oval Port 24° Magnum Basic Package Components 50% CNC Ported Combustion Chambers 40% CNC Ported Exhaust Ports (Bowl Blend) 80% CNC Ported Intake Ports (Bowl Blend) & Gasket Port Match Competition 5-Angle Valve Job Intake Valve, 2.190' x 5.460' o.a.l. Exhaust Valve, 1.880' x 5.448' o.a.l. 1.550' OD Hydraulic Roller Dual Valve Spring, 170 lbs. on seat, 473 lbs @ .600' maximum lift, max RPM 6300-6500 10º 1.450' 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 265cc Oval Port 24° Magnum Street Head Specifications Head Torque w/Moly Lube 75 Ft. Lbs. Rocker Stud Torque 55 Ft. Lbs. Intake Port Gasket Fel-Pro 375-1212 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket. Exhaust Port Gasket AFR 033-6858 Head Gasket 4.540' Bore, Fel Pro 375-1017
AFR 033-6850Head Bolts & Studs Standard ARP Head Bolt Washers Manley Standard Stud Girdle AFR 033-6210 Suggested Manifold Weiand Stealth or Edelbrock Vic Jr. or RPM Performer Spark Plug Starting Range Autolite 3935 Combustion Chambers 113cc As Cast Intake Port Volume 265cc As Cast Exhaust Port Volume 115cc As Cast 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, 97cc Maximum .009' per cc Flat Mill, 102cc Maximum .006' per cc NOTE: Flat and Angle mills might require a .120' thick head gasket.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
''As-Cast'' Small Port, High Velocity, Torque Monster!
Want to wake up the Big Block in your favorite tow vehicle? AFR's partially CNC ported 265cc high velocity oval port is just the ticket! They are also ideal on smaller cubic inch street performance applications (396-468ci), providing ''gobs'' of bottom end torque, tremendous throttle response, and great all around power. With AFR's trademark 3/4'' deck, reinforced rocker stud bosses, and thick rugged castings, you can own the strongest and most efficient heads on the market today. Premium hardware such as 2.19''/1.88'' one-piece stainless valves, 1.550'' double springs, 10-degree locks and retainers, and high quality studs and guideplates all come as standard equipment. Take note the higher flowing exhaust ports and bolt pattern are raised .375'' (3/8'') over stock location, this rarely affects header or chassis fitment. These heads have no EGR and are not emissions legal. .
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Installation Notes: Optional stud girdle required for 2° rolled valve angles and 1'' longer head bolt needed on four bottom exhaust bolt holes.
265cc Oval Port Magnum Street Cylinder Head Features:
- 50% CNC Ported Combustion Chambers
- 40% CNC Ported Exhaust Ports (Bowl Blend)
- 80% CNC Ported Intake Ports (Bowl Blend)
- Competition 5-angle Valve Job
- 265cc Intake Ports
- 115cc Exhaust Ports (as cast)
- Intake Valve, 2.190'' x 5.460'' Overall Valve Length
- Exhaust Valve, 1.880'' x 5.448'' Overall Valve Length
- Hydraulic Roller Valve Spring: 1.550'' OD Hydraulic Roller Dual Valve Spring, 170 lbs on seat, 473 lbs @ .600'' maximum lift
- Solid Roller Valve Spring: 1.550'' OD PAC Racing Solid Roller Valve Spring, 225 lbs on seat, .680'' maximum lift
- 10° 1.450'' Chrome Moly Retainers
- 10° Valve Locks
- 7/16'' Rocker Studs
- Adjustable 3/8'' Guide Plates
- Viton Valve Seals
- Hardened Spring Seats
- Intake Valve Seats
- Exhaust Valve Seats
- Bronze Valve Guides
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Part Number : 070-135-3703
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Magnum Dual-Plane Intake Manifold for Big Block Chevy 9.8 in. Deck with Oval-Port Cylinder Heads
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