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- WP DR 1213 Series Cylinder Head
- 315cc Intake Ports
- 49cc Combustion Chambers
- 2.230'' Intake TI / 1.580'' Exhaust TI Valves
- 1.550'' Dia. Springs - 260# Seat Pressure
- Titanium Retainers
- Angle Plug
- Assembled, Sold Individually
Cylinder Head Specifications - Intake Port Volume: 315cc
- Combustion Chamber Volume: 49cc
- Valves: 2.230' dia. x 6.250' o.a.l. Titanium Intake (52° Valve Seat Angle) / 1.580' dia. x 6.250' o.a.l. Titanium Exhaust (45° Valve Seat Angle) ( 11/32' Stem Diameter )
- Valve Springs: 1.550' Diameter - Open Pressure: 600 lbs.; Closed Pressure: 260 lbs.; Installed Height: 1.950'; Max Lift: .800'
- Spring Retainers: 1.550' 10° Titanium
- Rocker Studs: Shaft System Required
- Guide Plates: N/A
- 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-MG2200, Cometic p/n 245-C5423
- 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-MG52464 (Trim to fit), Cometic p/n 245-C5422 (Spread Port)
- Head Studs: Available from Brodix
- Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
- Valve Angle: 13.5°
- Angle Milling: N/A
- Flat Milling: .0060' per cc
- Pushrod Slots: Left Bare and Uncut
- Stud Girdle: N/A
- Rocker Arms: Shaft System with 95/150 Spacing - T&D 22221, Jesel KPS 411164
- Lifters: .180' Offset
- Pistons: Special 13.5° with -12 spark plug angle
- Pushrods: Special Length
- Intake Face Angle: 5°
- Exhaust Pattern: Spread Port with Stahl Bolt Pattern Header Flange
- Valve Centerline: 95/150
- Spring Pockets: 1.550' Out of the Box, May be cut to 1.625' - No larger or deeper
- Accessory Bolt Holes are Drilled
- Recommended Intake Manifold: Fuel Injection
Highest Intake Port Location in the Industry
DR 1213 - 12.5° Intake & 13.5° Exhaust Valve Angles
GB 2000 - 13.5° Intake & Exhaust Valve Angles
The Brodix GB Series is in a class by itself. These 13.5° valve angle heads were designed with sprint cars, late models, and drag racing in mind. The GB 2000 series features improved spark plug angles, highly efficient combustion chambers, raised intake ports, moved valve centerlines, and a raised valve cover rail. The latest evolution of the GB head is the DR 1213 which features a 13.5° exhaust valve angle and a 12.5° intake valve angle for even greater air flow.
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Special components required for the GB 2000 series and DR heads are injectors or modified intake manifold, sheet metal valve covers, and a shaft rocker system. 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. Bare heads sold in pairs, Assembled heads sold individually. !
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