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Brodix 2021028

BB-2 XTRA Series Cylinder Head 365cc Intake Ports

Brodix 2021028

Part Number: 158-2021028

BB-2 XTRA Series Cylinder Head
  • 365cc Intake Ports
  • 115cc Combustion Chambers
  • 2.300'' Intake / 1.880'' Exhaust Valves
  • 1.550'' Dia. Springs - 240# Seat Pressure
  • Steel Retainers
  • Assembled, 1/pkg.
  • $1,099.24
    Ships 11/17/16
    if Ordered Today
    FREE Shipping
    Brodix 2021028 BB-2 XTRA Series Cylinder Head 365cc Intake Ports $1,099.24

    Brodix 2021028 Details

    BB-2 XTRA Series Cylinder Heads

  • 365cc Intake Port Volume
  • 1.550'' Diameter Valve Springs - 550# Open, 240# Closed Spring Pressure
  • Cylinder Head Specifications
  • Intake Port Volume: 365cc - Rectangle Port
  • Combustion Chamber Volume: 115cc
  • Valves: 2.300'' dia. x 5.468'' o.a.l. Intake / 1.880'' dia. x 5.394'' o.a.l. Exhaust ( 11/32'' Stem Diameter )
  • Valve Springs: 1.550'' Diameter - Open Pressure: 550 lbs.; Closed Pressure: 240 lbs.; Installed Height: 1.950''; Max Lift: .700''
  • Spring Retainers: 1.550'' 10° Steel
  • Rocker Studs: 7/16''
  • Guide Plates: 3/8''
  • Valve Seals: 11/32''
  • Spark Plug Configuration: Angled

    Facts and Related Components
  • Torque Heads: 70 ft-lb.
  • Torque Rocker Studs: 40-45 ft-lb.
  • Intake Gasket: Brodix p/n 158-MG2001, Fel-Pro p/n 375-1252-3, Cometic p/n 245-C5428
  • Head Gasket: 4.310'' Bore - Fel-Pro p/n 375-1027, Cometic p/n 245-C5432; 4.540'' Bore - Fel-Pro p/n 375-1017, Cometic p/n 245-C5433; 4.600'' Bore - Fel-Pro p/n 375-1057, Cometic p/n 245-C5434
  • Exhaust Gasket: Fel-Pro p/n 375-1411 or Cometic p/n 245-C5429
  • Head Bolts: ARP p/n 070-135-3606, Manley p/n 660-42192
  • Head Studs: ARP p/n 070-235-4702 (12-point)
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Valve Angle: 26° and 4° Intake, 17° and 4° Exhaust
  • Angle Milling: .0066'' per cc
  • Flat Milling: .0050'' per cc
  • Pushrod Slots: Standard
  • Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
  • Stud Girdle: Standard, Brodix p/n 158-1230
  • Rocker Arms: Standard
  • Lifters: Standard
  • Pistons: Standard w/BB-2 X, BB-2 XTRA, BP BB-2 XTRA; Check Piston Valve Notches w/BB-3
  • Exhaust Pattern: Raised .600''
  • Valve Centerline: Standard w/BB-2 X, BB-2 XTRA, BP BB-2 XTRA; Exhaust Valve Moved .300'' w/BB-3
  • Spring Pockets: May not be cut any larger or deeper than 1.625''
  • Accessory Bolt Holes are Drilled
  • Recommended Intake Manifold: Brodix HV 2000 (p/n 158-HV2000) / HV 2001 (p/n 158-HV2001)

  • Specifications:

    Manufacturer's Part Number:

    Proven Competition Head That Works with
    Most Standard Big-Block Chevy Components!

    26°/4° Intake & 17°/4° Exhaust Valve Angles

    The BB-2 X head works well with a light car or large engine (509-555ci). It has a 340cc intake port and flows over 360 cfm with only the bowls blended and the intake ports matched to the gasket. Available with a 110cc, 115cc or 119cc combustion chamber, but may be angle machined to 98cc. The BB-2 X features a CNC'd intake port match and bowls are blended while the intake ports, exhaust ports and combustion chambers remain as casted.
    The BB-2 XTRA head works well on a 540ci or larger engine. It has a 365cc intake port and flows over 375 cfm with only the bowls blended and the intake ports matched to the gasket. The BB-3 works well on a 540-605ci engine. It has an exhaust valve centerline that is moved by .300'' with a 370cc intake port and flows over 370 cfm, but may not be angle machined. While creating the 100% CNC Ported BP series BB-2 XTRA, the professionals at Brodix invested many long hours on the flow bench and at the track developing a completely ported cylinder head. Brodix incorporated this porting design into a ported masterpiece that can be mass produced. The BP BB-2 XTRA heads are CNC-ported to a mirror finish and flow within 1% of each other. The bottom line is that Brodix builds you the most accurate, best flowing out-of-the-box cylinder heads available at the best price. These cylinder heads accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600'' higher than stock. Valve cover rails are now raised to assure no oil leakage. 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 Individually, 1/pkg. Made in the USA!

      VALVE SPRING   Specs
      1.550'' Diameter Valve Spring for Mechanical Flat Tappet & Hydraulic Roller Lifter Cam
  • Spring Pressure Open: 550 lbs.
  • Spring Pressure Closed: 240 lbs.
  • Installed Height: 1.950''
  • Max Lift: .700''
  •   1.625'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 745 lbs.
  • Spring Pressure Closed: 255 lbs.
  • Installed Height: 2.050''
  • Max Lift: .800''
  •   1.645'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 945 lbs.
  • Spring Pressure Closed: 330 lbs.
  • Installed Height: 2.100''
  • Max Lift: .875''
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