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Vehicle Info Needed1011-FT Fully-Assembled 200 cc Enforcer Cylinder Head for Small Block Chevy w/Straight Plugs & Flat Tappet Cam
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Part Number : 555-210041
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AFR 1011-FT Enforcer Aluminum Head Features:
- For 350 to 400 ci. engines operating below 6000 RPM
- ARP Rockers Studs
- Racing Springs
- Viton Valve Seals
- AFR Adjustable Guide Plates
- Machined Bead Valve Locks (Not Stamped)
- Hardened Spring Cups
- One-Piece 8 mm 21 4N Stainless Steel Valves
- Intake Port Volume: 198 to 200 cc
- Intake Port Dimension: 2.080 in. H x 1.270 in. x 5/16 in. Radius
- Intake Port Location: Stock
- Exhaust Port Volume: 74 cc
- Exhaust Port Dimension: 1.450 in. H x 1.550 in. W
- Valve Angle: 23°
- Exhaust Port Location: Stock
- Valve Cover Bolt Pattern: Perimeter Bolt
- Valve Spring Pocket Diameter: 1.500 in. O.D
- Max Valve Spring Pocket Machining: 1.580 in. O.D
- Deck Thickness: .470 in.
- Minimum Bore Diameter: 4.000 in.
- Minimum Head Gasket Bore: 4.100 in.
- Reduce Combustion Chamber Size by 1 cc by Flat-Milling .006 in. from the Deck Surface, Maximum Mill .048 in. to achieve 56 cc.
- Spark Plug Dimensions: 14 mm x .750 in. with Gasket Seat Such as Autolite AR3924 or equivalent (sold separately)
AFR 1011-FT Enforcer Aluminum Head Notes:
- We strongly recommend using 7/16 in. rocker studs with todays fast cam rates and RPM capabilities as 3/8 in. Rocker Studs can occasionally break
- Heads with 1.625 in. O.D springs will require some springs to be removed for access to some head bolts when installing the heads
- Heads are designed for 5/16 in. pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin
- AFR recommends the use of .120 in. thick-wall pushrods
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.
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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.
