BRODIX -12 SERIES SMALL BLOCK CHEVY BARE CYLINDER HEADS/15 1158000-1158004

Regular price $ 7,324.31

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

In the mid 1980’s, BRODIX was the first company to offer a “rolled over” valve angle cylinder

head. Since then, the -12 cylinder head has won thousands of late model and sprint car races

and is still winning races today. BRODIX has taken this design even further by adding raised

intake ports, several valve spacings, and more efficient combustion chambers. The -12 cylinder

head is available in several port sizes to fulfill our customers’ needs.

Package Heads:

• PS CB: VALVE BOWLS BLENDED • PS MI: MATCH INTAKE PORT TO FP 1263 (WP 12 SP RI, WP 12 SP RI MC) MATCH INTAKE PORT TO FP

1209 (KC 12 SP B, STS 12 SP W B MC) • PS Valve Job: COMPETITION VALVE JOB • Intake Valves: 2.150 X 5.440 o.a.l. - BR 60415 (40/60)

2.200 X 5.440 o.a.l. (70/125) • Exhaust Valves: 1.600 X 5.440 o.a.l. - BR 60044 • Valve Springs: 1.550 ROLLER VALVE SPRING - GA 1000, 240 lb

CLOSED, 550 lb OPEN, 1.950 INSTALLED HEIGHT, .700 MAXIMUM LIFT • Retainers: 1.550 10° TITANIUM - MA 2398BR

• Valve Locks: 10° JUMBO - CC 611 • Rocker Studs: SHAFT SYSTEM REQUIRED • Valve Seals: 11/32 - US VS529V

FACTS AND RELATED COMPONENTS:

• Torque Heads: 70 ft-lb • Torque Rocker Studs: 40-45 ft-lb • Intake Gaskets: FEL-PRO 1263, ASK FOR COMETIC PART NUMBER (WP 12 SP RI, WP 12 SP RI MC) FEL-PRO 1209 (KC 12 SP B, STS 12 SP W B MC) • Head Gaskets: 350 - FEL-PRO 1003, COMETIC C5399

400 - FEL-PRO 1004, COMETIC C5403 • Exhaust Gaskets: SPREAD PORT - BRODIX MG 52464 (TRIM TO FIT), COMETIC C5424

• Head Studs: ARP 234-4723 (12 pt WITH 3/8 CENTER STUDS) • Accessory Bolt Holes Are Drilled • Spark Plug Starting Points: NGK R5671A-10 FOR ALCOHOL NGK R5671A-9 FOR RACING GAS • Spring Pockets: 1.550 OUT OF THE BOX, MAY BE CUT TO 1.625 - NO LARGER OR DEEPER

• Valve Angle: 15° • Angle Milling: .0065 in PER cc • Flat Milling: .0055 in PER cc • Angle Machining: NOT AVAILABLE

• Pushrod Slots: 40/60, 58/107, 70/125 • Stud Girdle: NOT AVAILABLE • Rocker Arms: SHAFT SYSTEM WITH 40/60, 58/107 OR 70/125

SPACING, CHECK HEADS FOR NTAKE OFFSET 40/60 - TD 2206, JESEL KPS 01204 58/107 - TD 2207

70/125 - TD 22071 • Lifters: .180 OFFSET • Pistons: SPECIAL 15° • Pushrods: SPECIAL LENGTH

• Intake Face Angle: BRODIX 10° STANDARD

Cylinder Head Specifications:

INTAKE PORT CHAMBER VOLUME VALVE SIZES INTAKE/EXHAUST EXHAUST PATTERN VALVE CENTERLINE INTAKE MANIFOLD

WP 12 SP RI 247/262cc 60 cc 2.150/1.600 Spread Port 40/60 MS 89

WP 12 SP RI MC 262cc 61 cc 2.170/1.600 Spread Port 58/107 N/A

KC 12 SP B 287cc 61 cc 2.150/1.600 Spread Port 40/60 HV 1200 / HV 1201

STS 12 SP W B MC 305 cc 69 cc 2.200/1.600 Spread Port 70/125 HV 1200 / HV 1201

C ylinder head recommendations:

CUBIC INCH COMPRESSION CAMSHAFT RPM APPLICATION

WP 12 SP RI 358 - 41 13.5 Minimum Roller 4000-7500 Oval Track / Drag Race With Nitrous

WP 12 SP RI MC 358 - 410 13.5 Minimum Roller 4000-7500 Oval Track / Drag Race With Nitrous

KC 12 SP B 406 - 430 13.5 Minimum Roller 4000-7500 Oval Track / Drag Race With Nitrous

STS 12 SP W B MC 421 - 440 13.5 Minimum Roller 4000-7500 Oval Track / Drag Race With Nitrous

Flow Chart CFM @ 28" H20

VALVE SIZE 0.200 0.300 0.400 0.500 0.600 0.700 0.800

WP 12 SP RI -247 2.150 INTAKE 152 230 284 316 326 330

(CNC Ported) 1.600 EXHAUST 120 170 216 233 240 248

WP 12 SP RI - 262 2.150 INTAKE 150 228 282 322 330 335

(CNC Ported) 1.600 EXHAUST 120 170 216 233 240 248

WP 12 SP RI MC - 262 2.170 INTAKE 155 224 282 329 335 347

(CNC Ported) 1.600 EXHAUST 117 177 218 231 240 247

KC 12 SP B 2.150 INTAKE 155 230 284 320 343 354

(CNC Ported) 1.600 EXHAUST 120 168 216 232 240 247

STS 12 SP W B MC 2.200 INTAKE 159 233 290 334 361 372

(CNC Ported) 1.600 EXHAUST 106 145 190 221 235 247

BASIC EASY ORDER NUMBER:

• KC 12 SP B Bare Spread Port Exhaust 1158000 MAKE OFFER PER 2

• STS 12 SP W B MC Bare Spread Port Exhaust 1158004 MAKE OFFER PER 2

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