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AFR – Airflow Research 3250 – AFR Big Block Chevy 325cc Rectangle Port Magnum Aluminum Cylinder Heads

$2,291.14

AFR – Airflow Research# 3250

325cc Rectangle Port 24° Magnum Aluminum Cylinder Heads

  • BB-Chevy
  • 117cc Combustion Chambers
  • 50% CNC Combustion Chambers
  • Bare Head Only
  • Sold in Pairs, 2/pkg.

SKU: 3250. Categories: , .

Product Description

AFR – Airflow Research 3250 – AFR Big Block Chevy 325cc Rectangle Port Magnum Aluminum Cylinder Heads Details

50% CNC Combustion Chamber (Bowl Blend) Package

 

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 325cc Rectangle Port 24° Magnum Basic Package Components

50% CNC Ported Combustion Chambers
Bowl Blended Exhaust Ports
Bowl Blended Intake Ports
Competition 5-Angle Valve Job
Intake Valve Size – 2.300” (Valve not included)
Exhaust Valve Size – 1.880” (Valve not included)
Intake Valve Seats
Exhaust Valve Seats
Bronze Valve Guides
Big Block Chevy 325cc 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 117cc Partially CNC Bowl Blend
Intake Port Volume 325cc Partially 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.