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Brodix 1258101

-15 Series Cylinder Heads Std Exhaust Port

158-1258101

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Ships 12/19/16 if Ordered Today
Brodix 1258101 -15 Series Cylinder Heads Std Exhaust Port $5,388.42
-15 Series Cylinder Heads
  • Std Exhaust Port
  • 267cc Intake Ports
  • 51cc Combustion Chambers
  • 2.180'' Intake (TI) / 1.625'' Exhaust (ST) Valves
  • 1.550'' Dia. Springs - 240# Seat Pressure
  • Titanium Retainers
  • Angle Plug
  • Assembled, 2/pkg.

  • Brodix 1258101 Details

    -15 Series Cylinder Heads

  • Standard Exhaust Ports
  • Cylinder Head Specifications
  • Intake Port Volume: 267cc
  • Combustion Chamber Volume: 51cc
  • Valves: 2.180'' dia. x 5.850'' o.a.l. Intake (Titanium) / 1.625'' dia. x 5.850'' o.a.l. Exhaust (Steel) ( 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° Titanium
  • 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-MG1550
  • Head Gasket: Fel-Pro p/n 375-1003 (350ci) / 375-1004 (400ci) or Cometic p/n 245-C5399 (350ci) / 245-C5403 (400ci)
  • Exhaust Gasket: Brodix p/n 158-MG1506 (Standard Port)
  • Head Studs: Brodix SK HS 15C/18C AP (Brodix Aluminum Block)
  • Spark Plug Specs: 14mm Thread, .750'' (3/4'') Reach, Gasket Seat
  • Valve Angle: 15°
  • Angle Milling: .0065'' per cc
  • Flat Milling: .0055'' per cc
  • Pushrod Slots: 58/107
  • Stud Girdle: N/A
  • Rocker Arms: Shaft System with 58/107 Spacing (Check heads for intake offset) - T&D 2239, Jesel KPS 306114, Crower 7417F
  • Lifters: .180'' Offset
  • Pistons: Special 15°
  • Pushrods: Special Length
  • Intake Face Angle: 5°
  • Exhaust Pattern: Stahl
  • Valve Centerline: 58/107
  • Spring Pockets: 1.550'' Out of the Box - No larger or deeper
  • Accessory Bolt Holes are Drilled
  • Recommended Intake Manifold: Brodix HV 1500 (p/n 158-HV1500) / HV 1501 (p/n 158-HV1501)

  • Specifications:

    Manufacturer's Part Number:
    1258101

    +30HP Over the Best 18° Head Designs!
    15° Intake & Exhaust Valve Angles

    The Brodix Small Block Chevy -15 Series Aluminum Cylinder Head is 100% CNC-ported and one of the latest in a long line of heads designed by Brodix for the dirt late model market. This new creation features a 15-degree valve angle, center cylinder valve placement, specially raised and shaped intake and exhaust ports, and a newly designed chamber and spark plug angle that works well with any type of fuel. 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. The industry standard has been taken to the next level with modernized CNC porting. 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 interlocking valve seats installed. Sold in Pairs. Made in the USA!

      VALVE SPRING   Specs
      1.550'' Diameter Valve Spring for Mechanical Roller Lifter Cam
  • Spring Pressure Open: 550 lbs.
  • Spring Pressure Closed: 240 lbs.
  • Installed Height: 1.950''
  • Max Lift: .700''
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