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Air Flow Research

Cyl Heads, AFR Magnum "As-Cast", BBC, 305/132cc, 117cc Chamber, Assembled

Part# : CH35732
Mfg#: 2100
Sold As: Pair
Ship Size: Oversize 3
$3,429.99
List Price: $3,773.95
You Save $343.96

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Vehicle Specific View fitment for 4 models
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Chevrolet Big Block 305cc Magnum Heads by Air Flow Research®

Partially CNC-ported A356 Magnum heads pair 305/132cc runners with a Competition 5-angle valve job.

Air Flow Research® 305cc Big Block Chevrolet Magnum heads use A356 aluminum castings with partially CNC-machined intake and exhaust runners, a CNC bowl-blended chamber and Competition 5-angle valve job. Designed for moderate street and street/strip combinations up to 509 ci and about 6500 RPM, they are rated at up to 368 CFM at .700-inch lift. This assembled version uses 305cc intake and 132cc exhaust ports with a 117cc chamber. Sold as a pair.

• Air Flow Research® 305cc BBC Magnum series • Partially CNC-ported intake and exhaust runners • 305cc intake / 132cc exhaust ports • 117cc combustion chamber • Competition 5-angle valve job • Up to 509ci / approximately 6500 RPM; 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 305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
1964–1987 Chevrolet El Camino 305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
1978–1983 Chevrolet Malibu 305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
1970–1988 Chevrolet Monte Carlo 1970–1977: 305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
305/132cc INT/EXH, 2.380"/ 1.720" valves - 117cc chamber, angle plug, assembled
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Cyl Heads, AFR Magnum
Air Flow Research Cyl Heads, AFR Magnum "As-Cast", BBC, 305/132cc, 117cc Chamber, Assembled