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[tab title=”Description”]
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. 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.
Call one of our technicians to match a GB series head to your particular application.
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[tab title=”Details”]
Package Heads |
Facts and Related Components |
• PS CB: Valve Bowls Blended • PS MI: • PS Valve Job: • Intake Valves: • Exhaust Valves: • Valve Springs: • Retainers: • Valve Locks: • Rocker Studs: • Valve Seals: |
• Torque Heads: 70 ft-lb • Torque Rocker Studs: • Intake Gaskets: • Head Gaskets: • Exhaust Gaskets: • Head Studs: • Accessory Bolt Holes Are Drilled • Spark Plug Starting Points: • Spring Pockets: • Valve Angle: • Angle Milling: • Flat Milling: • Angle Machining: • Pushrod Slots: • Stud Girdle: • Rocker Arms: • Lifters: • Pistons: • Pushrods: • Intake Face Angle: • Valve Covers: • Valve Centerline: • Intake Manifold: |
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[tab title=”Flow Chart”]
Flow Chart cfm @ 28″ H20
Valve Size |
0.200 |
0.300 |
0.400 |
0.500 |
0.600 |
0.700 | 0.800 | |
WP DR 1213 (CNC Ported) |
2.230 Intake | 141 | 221 | 295 | 351 | 396 | 421 | 435 |
1.580 Exhaust | 105 | 159 | 210 | 237 | 252 | 262 | 268 | |
WP GB 2000 – 286 (CNC Ported) |
2.220 Intake | 157 | 238 | 302 | 353 | 381 | 399 | |
1.580 Exhaust | 109 | 152 | 205 | 232 | 241 | 250 | ||
WP GB 2200 – 282 (CNC Ported) |
2.200 Intake | 150 | 223 | 286 | 336 | 368 | 383 | |
1.580 Exhaust | 104 | 158 | 210 | 235 | 246 | 252 | ||
WP GB 2200 – 282+30 (CNC Ported) |
2.200 Intake | 150 | 224 | 289 | 337 | 371 | 396 | |
1.580 Intake | 104 | 158 | 210 | 235 | 246 | 252 | ||
WP GB 2300 – 309 (CNC Ported) |
2.200 Intake | 153 | 231 | 286 | 342 | 374 | 394 | |
1.580 Exhaust | 100 | 151 | 216 | 243 | 250 | 253 | ||
WP GB 2400 – 325 (CNC Ported) |
2.200 Intake |
CALL FOR FLOW NUMBERS
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1.580 Exhaust |
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[tab title=”Easy Order Numbers & More”]
Basic Easy Order Numbers
Part# | Easy Order # |
Port Vol. |
Cham. Vol. |
Int/Ext Valve |
Spring Seat Pressure |
Spring Diam. |
Ret. ST/TI |
Per |
DR 1213 Bare |
1160000 | 315 | 49 | 2 | ||||
WP DR 1213 Bare |
1168000 | 315 | 49 | 2 | ||||
WP DR 1213 Pkg |
1168100 | 315 | 49 | 2.230 TI / 1.600 TI | 250 | 1.560 | TI | 1 |
GB 2000 Bare |
1130000 | 265 | 64 | 2 | ||||
GB 2000 Special |
1139002 | Custom Order | 2 | |||||
WP GB 2000 L Bare |
1138000 | 286 | 76 | 2 | ||||
WP GB 2000 Bare |
1138001 | 286 | 76 | 2 | ||||
WP GB 2000 L Pkg |
1138100 | 286 | 76 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2000 Pkg |
1138101 | 286 | 76 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2000 L Special |
1139000 | Custom Order | 2 | |||||
WP GB 2000 Special |
1139001 | Custom Order | 2 | |||||
WP GB 2200 Bare |
1138006 | 282 | 69 | 2 | ||||
WP GB 2200 L Bare |
1138002 | 282 | 69 | 2 | ||||
WP GB 2200 Pkg |
1138104 | 292 | 69 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2200 L Pkg |
1138105 | 292 | 69 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2300 Bare |
1138007 | 309 | 49 | 2 | ||||
WP GB 2300 L Bare |
1138003 | 309 | 49 | 2 | ||||
WP GB 2300 Pkg |
1138106 | 309 | 49 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2300 L Pkg |
1138107 | 309 | 49 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GB 2400 Bare |
1138004 | 325 | 53 | 2 | ||||
WP GB 2400 L Bare |
1138005 | 325 | 53 | 2 | ||||
WP GB 2400 Pkg |
1138102 | 325 | 53 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
WP GP 2400 L Pkg |
1138103 | 325 | 53 | 2.200 TI / 1.580 ST | 240 | 1.550 | TI | 1 |
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[tab title=”Instruction Sheet”]smallblockheadinstructions
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