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Brodix 1051004

ST 5.0 R Series Cylinder Head 171cc Intake Ports

Brodix 1051004

158-1051004

made in usa
jegs shipping
FREE Shipping
Ships 12/16/16 if Ordered Today
Brodix 1051004 ST 5.0 R Series Cylinder Head 171cc Intake Ports $1,233.70
ST 5.0 R Series Cylinder Head
  • 171cc Intake Ports
  • 60cc Combustion Chambers
  • 1.940'' Intake / 1.600'' Exhaust Stainless Steel Valves
  • 1.470'' Dia. Springs - 125# Seat Pressure
  • Steel Retainers
  • Assembled, 2/pkg.

  • Brodix 1051004 Details

    ST 5.0 R Series Cylinder Heads

  • 171cc Intake Port Volume
  • 1.470'' Diameter Valve Springs - 325# Open, 125# Closed Spring Pressure
  • Cylinder Head Specifications
  • Intake Port Volume: 171cc
  • Combustion Chamber Volume: 60cc
  • Valves: 1.940'' dia. x 4.920'' o.a.l. Stainless Steel Intake / 1.600'' dia. x 4.940'' o.a.l. Stainless Steel Exhaust ( 11/32'' Stem Diameter )
  • Valve Springs: 1.470'' Diameter - Open Pressure: 325 lbs.; Closed Pressure: 125 lbs.; Installed Height: 1.900''; Max Lift: .575''
  • Spring Retainers: 1.430'' 7° Steel
  • Rocker Studs: N/A
  • Guide Plates: 5/16''
  • Valve Seals: 11/32''
  • Spark Plug Configuration: Angled

    Facts and Related Components
  • Torque Heads: 100 ft-lb. with 1/2'' Studs; 70 ft-lb. with 7/16'' Studs
  • Torque Rocker Stands: 30 ft-lb.
  • Torque Rocker Studs: 40-45 ft-lb.
  • Intake Gasket: Fel-Pro 1250 (p/n 375-1250)
  • Head Gasket: Fel-Pro p/n 375-1011-1 or 375-1011-2
  • Exhaust Gasket: Fel-Pro p/n 375-1487
  • Head Bolts: ARP p/n 070-154-3605 (289-302ci); 070-154-3603 (351ci)
  • Head Studs: ARP p/n 070-154-4005 (289-302ci); 070-154-4203 (351ci)
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Valve Angle: 20° Intake, 20° Exhaust
  • Angle Milling: N/A
  • Flat Milling: .0060'' per cc
  • Valve Centerline: 53/119
  • Rocker Arms: Ford Stock 5.0 Standard Non-Adjustable Rockers (Ford Motorsports p/n M6564-B351) for St 5.0 Series; Any Ford Roller Rockers with 7/16'' Rocker Studs for ST 5.0 R Series
  • Lifters: Standard
  • Spring Pockets: May not be cut any larger or deeper than 1.550''
  • Accessory Bolt Holes are Drilled
  • Recommended Intake Manifold: Small Block Ford
  • Air Tube: Stock air tube can be used with minor modifications

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Volume (cc)
    60
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    Yes
    Exhaust Port Location
    Raised
    Exhaust Port Shape
    Square
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    Yes
    Guideplates Included
    Yes
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    171
    Intake Valve Diameter (in.)
    1.94
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.575
    Number of Springs Per Valve
    Dual
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.47
    Quantity
    Sold as a pair
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nut Thread Size (in.)
    7/16"-20
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Angled
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Perimeter bolt
    Valve Guide Material
    Phosphorous bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    1051004

    50+ Horsepower Increase Over Stock
    Small Block Ford Heads!

    20° Intake & Exhaust Valve Angles

    The Brodix ST 5.0 Series cylinder head was developed to fit the Ford Windsor engine. Out of the box, completely assembled ST 5.0 series heads produce a 50 horsepower increase over other stock heads, and the combustion chambers may be milled into the mid-50cc range. All existing stock Ford 5.0L accessories (including the stock non-adjustable rocker arms which are required use on the ST 5.0 series) can be used in the installation of the Brodix ST 5.0 series. A modified version, the Brodix ST 5.0 R series, allows the use of 7/16'' Ford roller rockers. The exhaust ports are raised .500'' higher than stock Windsor heads on both versions. The BP ST 5.0 R series is completely CNC ported and outflows all other heads in its class. While creating the 100% CNC Ported BP ST 5.0 R series, the professionals at Brodix invested many long hours on the flow bench and at the track developing a completely ported cylinder head. The bottom line is that Brodix builds you the most accurate, best flowing out-of-the-box cylinder heads available at the best price. Every casting is poured from A-356 virgin aluminum and tested before Brodix utilizes their in-house processes such as finish machining and heat treating to assure that you receive the best products for your hard-earned money. Other features include a thick deck surface that is compatible with nitrous, drilled and tapped holes on the ends for standard drive accessories, phosphorous bronze valve guides and hardened valve seats installed for unleaded fuel. Sold in Pairs, 2/pkg. Made in the USA!

      VALVE SPRING   Specs
      1.470'' Diameter Valve Spring for Hydraulic Roller Lifter Cam
  • Spring Pressure Open: 325 lbs.
  • Spring Pressure Closed: 125 lbs.
  • Installed Height: 1.860''
  • Max Lift: .575''
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