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Air Flow Research

Cyl Heads, AFR Magnum "As-Cast", BBC, 265/132cc, Hydraulic Roller, Assembled

Part# : CH35735
Mfg#: 3610
Sold As: Pair
Ship Size: Oversize 3
$2,653.99
List Price: $2,919.95
You Save $265.96

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Vehicle Specific View fitment for 4 models
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Chevrolet Big Block 265cc Magnum Hydraulic-Roller Heads by Air Flow Research®

High-velocity 265cc A356 Magnum heads use partial CNC porting and a Competition 5-angle valve job.

Air Flow Research® 265cc Big Block Chevrolet Magnum oval-port heads use A356 aluminum castings with partially CNC-machined runners and bowl-blended chambers plus a Competition 5-angle valve job. The small-port, high-velocity design is aimed at street, towing and street/strip combinations up to 468 ci and about 6200 RPM, flowing up to 354 CFM at .650-inch lift. This assembled version uses 265cc intake and 132cc exhaust ports and is configured for hydraulic-roller use. Sold as a pair.

• Air Flow Research® 265cc BBC Magnum oval-port series • Partially CNC-ported runners and chambers • 265cc intake / 132cc exhaust ports • Competition 5-angle valve job • Up to 468ci / approximately 6200 RPM • Hydraulic-roller assembly; sold as a pair

Notes

  • AFR BBC heads are designed for 3/8" pushrods, larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120" thick-wall pushrods.
  • For ideal geometry and wipe pattern on BBC heads, AFR strongly recommends AFR stud mount rockers for applications below 7400 RPM and .790 lift. For applications above these limits shaft mount rockers are typically advised.
  • AFR recommends a minimum depth of .080" on the intake valve and .100" on the exhaust with a radical clearance of .020" minimum around the perimeter of each valve. The position of the valve pocket must also be addressed.
  • Flat or angle mills could affect flow numbers and might require a thicker intake gasket.
  • This item is not eligible for any further discounts or promotional pricing.
  • This item is Oversize 3, and is excluded from free ground shipping.
3
This product is not legal for street use on an emissions-controlled vehicle. It may be used on dedicated competition or pre-pollution-controlled vehicles only. Learn More
We aim to provide accurate and complete product information. If you notice anything incorrect, missing, or unclear, please let us know.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1964–1977 Chevrolet Chevelle 265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
1964–1987 Chevrolet El Camino 265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
1978–1983 Chevrolet Malibu 265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
1970–1988 Chevrolet Monte Carlo 1970–1977: 265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
265/132cc INT/EXH, 2.030"/1.770" valves - 109cc chamber, hydraulic roller, assembled
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Cyl Heads, AFR Magnum
Air Flow Research Cyl Heads, AFR Magnum "As-Cast", BBC, 265/132cc, Hydraulic Roller, Assembled