Brand: Airflow Research (AFR)
Manufacturer's Part Number: 3575
Part Type: Cylinder Heads
Product Line: AFR 377cc Magnum BBC Competition Racing Heads
Automotive Fittings Part Number: AFR-3575
Combustion Chamber Volume (cc): 121
Intake Runner Volume (cc): 377cc
Exhaust Runner Volume (cc): 135cc
Cylinder Head Style: Bare
Cylinder Head Material: Cast aluminum
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 2.300 in.
CNC-Machined Combustion Chamber: Yes
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Combustion Chamber Style: Open chamber
Intake Port Location: Standard
Exhaust Port Shape: Round
Exhaust Port Location: Raised
Intake Valves Included: No
Exhaust Valves Included: No
Exhaust Valve Diameter (in.): 1.880 in.
Valve Springs Included: No
Damper Spring Included: No
Retainers Included: No
Locks Included: No
Valve Stem Seals Included: No
Rocker Arm Studs Included: No
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 24
Exhaust Valve Angle: 15
Valve Guides Included: Yes
Valve Guide Material: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 5-angle intake/3-angle exhaust
Valve Seat Material: Ductile iron
Cylinder Head Color: Natural
Steam Holes Drilled: No
Oiling Style: Through head
Machined for O-Ring: No
Heat Crossover: No
Remanufactured: No
Quantity: Sold as a pair.
Description:
AFR 377cc Magnum BBC Competition racing heads feature 100 percent CNC-ported intakes, exhausts, and chambers; A356 aluminum castings, Titanium retainers, and high-quality components throughout. These Magnum BBC heads are best suited for large displacement (540 plus) racing engines operating at or below 7600 rpm. They are available assembled and bare.

AFR assembled 377cc Magnum BBC heads typically include:

* 11/32 in. intake valves
* 11/32 in. Tulip exhaust Valves
* PAC Racing Spring 1.625 O.D. Solid Roller, 275 lbs. on seat, .850 maximum lift
* 10 degree Titanium retainers
* 10 degree 11/32 in. valve locks with lash cap recess
* ARP 7/16 in. rocker intake and exhaust studs
* Adjustable 3/8 in. guide plates
* 11/32 in. Viton® valve seals
* Hardened spring cup
* Intake and exhaust valve seats
* 11/32 in. intake and exhaust bronze valve guides