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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