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Product Details

Flo-Tek Accessories

Complete Cylinder Head (203-505) by Flo-Tek®. FLO-TEK Performance cylinder heads feature as-cast ports and are designed for entry-level street performance applications operating in the idle-to-5500 rpm range. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a hassle free installation, this reliable product can help you get you vehicle back on the road faster and easier.



Weight: 20 Pounds
Length: 19.625"
Width: 7.25"
Height: 4.25"
Head Bolt Torque: 50-65-80 Ft-Lb, 75 Ft-Lb on Bottom (Permatex#80631)
Rocker Stud Torque: 45- 50Ft-Lb 7/16" Stud (non-pedestal)
Intake Port Gasket: Fel Pro 1262
Exhaust Port Gasket: Fel Pro 1487, MS15129Y
Head Gasket: Fel Pro 1011-1 or 1011-2, M6051-050
Head Bolts & Studs: ARP154-3605 (302), ARP154-3603 (351W), ARP254-3708
Head Bolt Washers: Mr. Gasket 87A
Suggested Manifold: Performer RPM or Weiand Street Warrior
Spark Plug Starting Range: NGK R5671A/4091, A65F-32C or Equivalent (hotter or colder)
Combustion Chambers: 58cc
Max Spring Pocket Diameter: 1.685"
Rocker Arms: Must have clearance for Valve Spring Retainers
Intake Valve: 1.94 or 2.02
Exhaust Valve: 1.60
Valve Spring: CL 142 @ 1.80, OP 400 @ 1.15, C/Bind- 1.040
Retainers: 7 Degree Chrome Moly Retainer
Valve Locks: 7 Degree Chrome Moly Locks
Rocker Stud: 3/8" Chrome Moly Rocker Stud, 7/16" avail.
Guideplate: Hardened Steel Guideplate
Valve Seals: Viton Positive Seals
Spring Cup: Hardened Steel Cups
Intake Valve Seat: Cast Alloy
Exhaust Valve Seat: Cast Alloy
Bronze Valve Guides: Phosphor Bronze


  • Designed to deliver trouble-free, consistent performance
  • Right for your vehicle and lifestyle
  • Made from high-quality materials for ultimate durability
  • Manufactured to meet or exceed strict quality requirements

In 2005, Tri-State Cylinder Head began research and development of the FLO-TEK® High Performance Aluminum Racing Heads. Introduction of the FLO-TEK Cylinder Heads were in production by 2007. Our first warehouse distributors were Speedway Motors and Vehicle Specialties, Inc. We now warehouse to the industry leaders such as Motorville, Motor State Distributors, Meyer Distributing/VSI, Speedway Motors and Performance Warehouse.

Part Number:

Warranty Information

FLO-TEK Performance Cylinder Head warrants each new FLO-TEK Cylinder head to be free from defect in workmanship for a one (1) year period from date of purchase provided that the FLO-TEK Cylinder Head is properly installed, subjected to normal use and service and that the cylinder head is not modified or changed in any way, nor damaged because of negligence by the customer or installer or used for racing or competition purposes. Customers who believe they have a defective product should either return it to the dealer from which it was purchased or ship it directly to Tri State Cylinder Head, Inc. (FLO-TEK Performance Racing Heads). Include proof of purchase and a complete description of the problem. The product must be returned freight prepaid. If a thorough inspection of the cylinder head by the factory indicates defects in workmanship or material, our obligation shall be to repair or replace the product. Warranty covers only the product itself and not the cost of installation or removal.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

Ford Bronco
1994 Ford Bronco
  • 5.0L With Ford Small Block
Ford E-series
1994 Ford E-series
  • 5.0L With Ford Small Block
1994 Ford E-150 Econoline / E-250 Econoline
  • 4.9L With Ford Small Block
Ford F-150
1994 Ford F-150
  • 5.0L With Ford Small Block
Ford F-250
1994 Ford F-250
  • 5.0L With Ford Small Block
Ford F-350
1994 Ford F-350
  • 5.0L With Ford Small Block
Ford Fairlane
1994 Ford Fairlane
  • 5.0L With Ford Small Block
Ford Fairmont
1994 Ford Fairmont
  • 5.0L With Ford Small Block
Ford Falcon
1994 Ford Falcon
  • 5.0L With Ford Small Block
Ford Mustang
1994 Ford Mustang
  • 5.0L With Ford Small Block
Lincoln Continental
1994 Lincoln Continental
  • With Ford Small Block
Lincoln Town Car
1994 Lincoln Town Car
  • With Ford Small Block
Mercury Cougar
1994 Mercury Cougar
  • With Ford Small Block
Mercury Grand Marquis
1994 Mercury Grand Marquis
  • With Ford Small Block

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