1506 Fully Assembled 210 cc LS1 Enforcer Cylinder Head Small Bore 5.3L
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AFR - AIRFLOW RESEARCHPART NUMBER: 033-1506

1506 Fully Assembled 210 cc LS1 Enforcer Cylinder Head Small Bore 5.3L

$71300
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GM Gen III/IV LS
Fully Assembled Enforcer Cylinder Head
  • GM LS 1 Small Bore 5.3L
  • 210 cc Intake Port Volume
  • 64 cc Combustion Chamber
  • 15 Degree Valve Angle
  • A356 Aluminum
  • Sold Individually

    AFR 1506 Fully Assembled 210 cc Enforcer Small Bore Cylinder Head Includes:

    • As Cast Combustion Chambers
    • As Cast Exhaust Ports
    • As Cast Intake Ports
    • 3-Angle Valve Job
    • 8 mm Bead Lock Intake Valves, 2.000 in. x 4.900 in. Overall Length: 7236
    • 8 mm Bead Lock Exhaust Valves, 1.570 in. x 4.915 in. Overall Length: 7235
    • PAC Racing 1.290 in. OD Hydraulic Roller Dual Valve Springs, 140 lbs Seat Pressure, .600 in. Max Lift, 6300–6500 Max RPM: 8017
    • 7° Chrome Moly Retainers, 1.245 in. OD x .885 in. ID x .655 in. Height: 8514
    • 7° Bead Lock Valve Keepers: 9007
    • Viton Valve Seals, .620 in. OD x .490 in. ID: 6615
    • Hardened Valve Spring OD Locators, 1.380 in. OD x .570 in. ID: 8042

    AFR 1506 Fully Assembled 210 cc Enforcer Small Bore Cylinder Head Features:

    • Designed for OEM Engines Operating Below 6,300 rpm
    • As-Cast Intake Runners, Exhaust Runners, and Combustion Chambers
    • Intake Port Dimension: 3.190 in. H x 1.015 in. W x 5/16 in. Top and 3/8 in. Bottom Radius
    • Intake Port Location: Stock Cathedral Port
    • Exhaust Port Volume: 82cc
    • Exhaust Port Dimension: 1.400 in. H x 1.660 in. W
    • Exhaust Port Location: Stock
    • Does not have Provisions for 1997-1998 Perimeter Valve Covers
    • Valve Spring Pocket Diameter: 1.500 in. O.D. Do not Increase Diameter or Depth
    • Deck Thickness: .425 in
    • Minimum Bore Diameter: 3.780 in.
    • Reduce Combustion Chamber Size 1 cc by Flat-Milling .006 in. from Deck Surface, Maximum Mill .048 in. to achieve 56 cc.
    • Spark Plug Dimensions: 14 mm x .708 in. (18 mm) Such as NGK TR55 (sold separately)

    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

    • AFR Enforcer Cylinder Heads

      AFR Enforcer Cylinder Heads are engineered to deliver improved airflow, increased horsepower potential, and dependable street performance for enthusiasts building high-performance small block and big block engine combinations. Designed by AFR Airflow Research, these cylinder heads provide an excellent balance of airflow efficiency, combustion performance, and affordability, making them a popular choice for street performance builds, restoration projects, muscle cars, and weekend racers. Whether you're upgrading a small block Chevy Camaro, building a Ford street machine, or refreshing a classic Mopar muscle car, AFR Enforcer Cylinder Heads offer the performance-focused engineering serious enthusiasts expect from AFR.

      Show More

      Cylinder heads play a critical role in determining engine airflow efficiency, combustion quality, and overall horsepower capability. AFR Enforcer Cylinder Heads are designed using advanced port and chamber technology to improve intake and exhaust flow characteristics compared to restrictive factory castings. Performance enthusiasts appreciate the ability to gain stronger throttle response, improved torque output, and enhanced top-end power while maintaining excellent street drivability and long-term reliability.

      Performance Benefits & Key Features

      AFR Enforcer Cylinder Heads are engineered to optimize airflow velocity and combustion efficiency for naturally aspirated street and mild racing applications. Their precision-designed intake runners and combustion chambers help improve cylinder filling and fuel atomization, contributing to increased horsepower and torque across a broad RPM range.

      Constructed from lightweight aluminum, these cylinder heads help reduce overall engine weight while improving heat dissipation and thermal stability compared to traditional cast iron designs. Enthusiasts benefit from improved cooling efficiency, reduced detonation risk, and enhanced engine responsiveness during aggressive driving conditions.

      These cylinder heads are commonly paired with aftermarket camshafts, intake manifolds, carburetors, EFI systems, and performance exhaust setups to maximize engine output and overall drivability. AFR Enforcer Cylinder Heads are especially popular for street performance builds, Pro Touring projects, drag racing applications, hot rods, and restoration vehicles where dependable power gains and consistent engine performance are priorities.

      Performance enthusiasts also value AFR’s reputation for CNC-inspired airflow development and precision manufacturing quality. The Enforcer series provides an accessible performance upgrade while still delivering the airflow improvements and engineering precision associated with AFR cylinder head technology.

      Fitment, Compatibility & Applications

      AFR Enforcer Cylinder Heads are compatible with a wide variety of GM, Ford, and Mopar V8 engine applications used in muscle cars, classic trucks, street rods, and custom performance vehicles. Popular applications include Camaros, Mustangs, Chevelles, Chargers, Novas, hot rods, and street/strip builds requiring improved airflow and modern cylinder head technology.

      Ideal for street performance enthusiasts, restoration builders, and weekend racers seeking dependable horsepower gains and improved engine efficiency, these cylinder heads deliver the quality and airflow performance expected from AFR Airflow Research. Explore the available AFR Enforcer Cylinder Head options to upgrade your engine with proven airflow technology and enhanced street performance.

    Part TypeCylinder Head
    Product LineAFR Enforcer Cylinder Heads
    BrandAFR - AIRFLOW RESEARCH
    Package Height6.0
    Package Width9.0
    Package Length21.0
    Weight30.0 PG
    Part CategoryPerformance Parts
    Valve Springs IncludedYes
    Cylinder Head MaterialAluminum
    Valve Guides IncludedYes
    Intake Port LocationStandard
    Cnc-Machined Intake RunnerNo
    Intake Valves IncludedYes
    QuantitySold individually
    Valve Stem Seals IncludedYes
    Exhaust Valves IncludedYes
    Accessory Bolt Holes DrilledYes
    Locks IncludedYes
    Exhaust Port LocationStandard
    Retainers IncludedYes
    Rocker Arms IncludedNo
    Combustion Chamber Volume (Cc)64
    Cylinder Head StyleAssembled
    Cylinder Head FinishNatural
    Valve Seats MachinedYes
    Part FitmentSemi Universal
    Intake Runner Volume (Cc)210
    Cnc-Machined Exhaust RunnerNo
    Cnc-Machined Combustion ChamberNo
    Vendor Part Number1506
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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