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BB-3 XTRA O 351 Series Cylinder Heads
- BP BB-3 XTRA O 351 Series Cylinder Head
- CNC Ported
- 351cc Oval Intake Ports
- 119cc Combustion Chambers
- 2.350'' Intake / 1.880'' Exhaust Valves
- 1.625'' Dia. Springs - 255# Seat Pressure
- Titanium Retainers
- Assembled, 1/pkg.
Cylinder Head Specifications - Intake Port Volume: 351cc - Oval Port
- Combustion Chamber Volume: 119cc
- Valves: 2.350' dia. x 5.568' o.a.l. Intake / 1.880' dia. x 5.494' o.a.l. Exhaust ( 11/32' Stem Diameter )
- Valve Springs: 1.625' Diameter - Open Pressure: 745 lbs.; Closed Pressure: 255 lbs.; Installed Height: 2.050'; Max Lift: .800'
- Spring Retainers: 1.625' 10° Titanium
- Rocker Studs: 7/16'
- Guide Plates: 3/8'
- 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: Brodix p/n 158-MG2104
- Head Gasket: 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: 24° and 4° Intake, 15° 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: 2° Valve Rolled Piston
- Exhaust Pattern: Raised .600'
- Spring Pockets: May not be cut any larger or deeper than 1.625'
- Accessory Bolt Holes are Drilled
- Recommended Intake Manifold: Brodix SA 2017 (p/n 158-SA2017) / SA 2027 (p/n 158-SA2027) / BM 2017 (p/n 158-BM2017) / BM 2027 (p/n 158-BM2027)
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
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Innovative Design and Performance That Accepts Most Standard Big Block Chevy Components!
Brodix built the BB-3 XTRA Series to take the conventional big block to the next level. These cylinder heads feature a valve angle that is rolled two degrees. The BB-3 XTRA Series is available in a rectangular-shaped or oval-shaped intake port configuration, and both are offered in an out-of-the-box version or completely CNC ported.
Part TypeCylinder Head
Product LineBrodix Big Block Chevy BB-3 XTRA Series Aluminum Cylinder Heads
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 Angle24
Maximum Valve Lift0.8 in (20.32 mm)
Valve Seat MaterialDuctile iron
Heat CrossoverNo
Number Of Springs Per ValveDual
Valve Springs IncludedYes
Spark Plug StyleStraight
Valve Seat Machine Style5-angle
Damper Spring IncludedYes
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedYes
QuantitySold individually
Valve Stem Seals IncludedYes
Intake Valve Diameter2.3 in (58.42 mm)
Accessory Bolt Holes DrilledYes
Exhaust Port LocationStandard
Valve Guide MaterialPhosphorous bronze
Outside Diameter Of Outer Spring1.625 in (41.3 mm)
Combustion Chamber Volume (Cc)115
Machined For O-RingNo
Exhaust Valve Angle15
Steam Holes DrilledNo
Rocker Arm Studs IncludedYes
Cylinder Head StyleAssembled
Part FitmentSemi Universal
Valve Cover Mounting StylePerimeter bolt
Retainer MaterialTitanium
Intake Runner Volume (Cc)351
Cnc-Machined Exhaust RunnerNo
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.88 in (47.752 mm)
Vendor Part Number2038104
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
