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Vehicle Info NeededBRODIXPART NUMBER: 158-1118100
BP -11X Series Cylinder Heads Spread Exhaust Port
$3,05199
Ships on 09/22/2026
Lowest Price GuaranteeBP -11X Series Cylinder Heads67cc Combustion Chambers Spread Exhaust Ports CNC Ported Combustion Chambers
- BP -11X Series Cylinder Heads
- Spread Exhaust Port
- 231cc Intake Ports
- 67cc Combustion Chambers
- 2.100'' Intake / 1.600'' Exhaust Valves
- 1.550'' Dia. Springs - 240# Seat Pressure
- Titanium Retainers
- Angle Plug
- Assembled, 2/pkg.
Cylinder Head Specifications - Intake Port Volume: 231cc
- Combustion Chamber Volume: 67cc
- Valves: 2.100' dia. x 5.065' o.a.l. Intake / 1.600' dia. x 5.065' 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° Titanium
- Rocker Studs: 7/16'
- Guide Plates: 5/16'
- Valve Seals: 11/32'
- Spark Plug Configuration: AngledFacts and Related Components
- Torque Heads: 70 ft-lb.
- Torque Rocker Studs: 40-45 ft-lb.
- Intake Gasket: Fel-Pro p/n 375-1206, Cometic p/n 245-C5414
- 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-MG1500 (Spread Port)
- Head Bolts: ARP p/n 070-134-3601 or Manley p/n 660-42313
- Head Bolt Washers: MANLEY p/n 660-42102
- Head Studs: ARP p/n 070-234-4301 (12-point)
- Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
- Valve Angle: 23°
- Angle Milling: .0078' per cc
- Flat Milling: .0060' per cc
- Pushrod Slots: 40/60
- Stud Girdle: 40/60 Brodix p/n 158-BR6440
- Rocker Arms: Standard, T&D Economy 40/60 2256, Jesel 40/60 Shaft System KPS 01302
- Lifters: Standard
- Exhaust Pattern: Standard or Spread Port
- Valve Centerline: 40/60
- Spring Pockets: May not be cut any larger or deeper than 1.550'
- Accessory Bolt Holes are Drilled
- Recommended Intake Manifold: Brodix BM 1000(p/n 158-BM1000) / HV 1000 (p/n 158-HV1000) / HV 1002 (p/n 158-HV1002) / SE 100 (p/n 158-SE100) / SE 102 (p/n 158-SE102)
Part TypeCylinder Head
BrandBRODIX
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
Rocker Arm Nut Thread Size (In.)7/16"-20
Exhaust Valves IncludedYes
Locks IncludedYes
Retainers IncludedYes
Lock Style10 degree
Guideplates IncludedYes
Rocker Arms IncludedNo
Oiling StyleThrough pushrod
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Valve Seats MachinedYes
Intake Valve Angle23
Maximum Valve Lift0.7 in (17.78 mm)
Valve Seat MaterialDuctile iron
Heat CrossoverNo
Number Of Springs Per ValveDual
Valve Springs IncludedYes
Spark Plug StyleAngled
Valve Seat Machine Style5-angle
Damper Spring IncludedYes
Valve Guides IncludedYes
Cnc-Machined Intake RunnerYes
Intake Valves IncludedYes
Combustion Chamber StyleHeart
QuantitySold as a pair
Valve Stem Seals IncludedYes
Intake Valve Diameter2.1 in (53.34 mm)
Accessory Bolt Holes DrilledYes
Exhaust Port LocationSpread
Valve Guide MaterialPhosphorous bronze
Outside Diameter Of Outer Spring1.55 in (39.4 mm)
Combustion Chamber Volume (Cc)67
Machined For O-RingNo
Exhaust Valve Angle23
Steam Holes DrilledNo
Rocker Arm Studs IncludedYes
Cylinder Head StyleAssembled
Part FitmentSemi Universal
Valve Cover Mounting StylePerimeter bolt
Valve Stem Seal StylePositive stop
Retainer MaterialTitanium
Intake Runner Volume (Cc)231
Cnc-Machined Exhaust RunnerYes
Cnc-Machined Combustion ChamberYes
Exhaust Valve Diameter1.6 in (40.64 mm)
Vendor Part Number1118100
Package Qty1
Package TypeEA
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