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- STS BB-1 Series Cylinder Head
- CNC Ported
- 305cc Intake Ports
- 119cc Combustion Chambers
- 2.250'' Intake / 1.880'' Exhaust Valves
- 1.625'' Dia. Springs - 255# Seat Pressure
- Titanium Retainers
- Assembled, 1/pkg.
Cylinder Head Specifications - Intake Port Volume: 305cc - Rectangle Port
- Combustion Chamber Volume: 119cc
- Valves: 2.250' dia. x 5.218' o.a.l. Intake / 1.880' dia. x 5.394' 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-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
- 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
- Exhaust Pattern: Raised .600'
- Valve Centerline: Standard
- Spring Pockets: May not be cut any larger or deeper than 1.625'
- Accessory Bolt Holes are Drilled
- Recommended Intake Manifold: BB-1 Brodix HV 2016 (p/n 158-HV2016) / HV 2000 (p/n 158-HV2000); STS BB-1 Brodix HV 2000 (p/n 158-HV2000) / HV 2001 (p/n 158-HV2001)
Accurate Airflow for Heavy BBC Builds
BRODIX BB-2 Plus Series 26-degree cylinder heads are engineered for heavy vehicles and smaller big block Chevy combinations in the 427-509 cu in range, delivering strong, repeatable airflow with a 312 cc intake port and 119 cc combustion chambers shaped for methanol or gasoline to help resist detonation. The 100% CNC-ported design is developed on the flow bench and at the track for consistent out-of-the-box performance, while standard-parts compatibility helps you retain common pistons, intake manifolds, and rocker arms. Raised .600 in. exhaust ports and a raised valve cover rail support improved flow and sealing for serious street/strip and bracket-style builds.
