BRODIX BBC BB-4 AND BB-5 SERIES CYLINDER HEADS/24 2048000

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

The BRODIX -4 and -5 valve angles have been rolled 2° from stock to produce more torque and less
chamber volume. The -4 and -5 have a raised intake port design (approximately .400”) allowing the
short-turn radius a better air flow angle without sacrificing velocity. Our competitors offer a similar
version of these heads, but they have larger intake ports in the stock location. The competitor ’s low
profile head slows down the air speed making the engine extremely lazy. When Sonny Leonard designed
the -5 cylinder head for larger cubic inch engines, he incorporated the most important things: correct
port shape, volume, and velocity. If you want to take the next step up from a standard valve angle
cylinder head, the BRODIX -4 or -5 is the ticket.

Package Heads:

• PS CB: VALVE BOWLS BLENDED• PS MI: MATCH INTAKE PORT TO BRODIX MG 2001• PS Valve Job: COMPETITION VALVE JOB• Intake Valves: 2.300 X 5.468 o.a.l. - BR 81241 (STANDARD PACKAGE) 2.300 X 5.568 o.a.l. - BR 81341 (SPRING UPGRADE) 2.350 X 5.568 o.a.l. - BR 81351 (SPRING UPGRADE)• Exhaust Valves: 1.880 X 5.394 o.a.l. - BR 81038 (STANDARD PACKAGE) 1.880 X 5.494 o.a.l. - BR 81138 (SPRING UPGRADE) 1.900 X 5.494 o.a.l. - BR 81139 (SPRING UPGRADE)• Valve Springs: 1.550 ROLLER VALVE SPRING - GA 1000, 240 lb CLOSED, 550 lb OPEN, 1.950 INSTALLED HEIGHT, .700 MAXIMUM LIFT (STANDARD PACKAGE) 1.625 ROLLER VALVE SPRING - MA 221424, 260 lb CLOSED, 790 lb OPEN, 2.100 INSTALLED HEIGHT, .800 MAXIMUM LIFT (SPRING UPGRADE)• Retainers: 1.550 10° STEEL - CC 752 1.625 10° TITANIUM - MA 23640• Valve Locks: 10° JUMBO - CC 611• Rocker Studs: 7/16 - BR 716L, AR RRS-4I• Guide Plates: 3/8 - CC 4806• Valve Seals: 11/32 - US VS529V

Facts And Related Components:

• Torque Heads: 70 ft-lb• Torque Rocker Studs: 40-45 ft-lb• Intake Gaskets: BRODIX MG 2001, COMETIC C5428, FEL-PRO 1252-3• Head Gaskets: 4.310 - FEL-PRO 1027, COMETIC C5432 4.540 - FEL-PRO 1017, COMETIC C5433 4.600 - FEL-PRO 1057, COMETIC C5434• Exhaust Gaskets: FEL-PRO 1411, COMETIC C5429• Head Bolts: ARP 135-3606, MANLEY 42192• Head Studs: ARP 235-4702 (12 pt)• Accessory Bolt Holes Are Drilled• Spark Plug Starting Points: NGK R5671A-9 FOR ALCOHOL NGK R5671A-8 FOR RACING GAS• Spring Pockets: MAY NOT BE CUT ANY LARGER OR DEEPER THAN 1.625• Valve Angle: 24° AND 4° INTAKE, 15° AND 4° EXHAUST• Angle Milling: .0066 in PER cc• Flat Milling: .0050 in PER cc• Angle Machining: NOT AVAILABLE• Dowel Shift: NOT AVAILABLE• Pushrod Slots: STANDARD• Stud Girdle: STANDARD, BRODIX 1230• Rocker Arms: STANDARD• Lifters: STANDARD• Pistons: 2° VALVE ROLLED PISTON• Pushrods: CHECK PUSHROD CLEARANCE WITH HEAD INSTALLED ON THE ENGINE BLOCK BEFORE FINAL ASSEMBLY

                                    INTAKE    CHAMBER    VALVE SIZES          EXHAUST             VALVE                        INTAKE 

                                     PORT        VOLUME           INT./EXH.              PATTERN       CENTERLINE               MANIFOLD

BB-4                           340 cc           119 cc            2.300/1.880             Standard             Standard            SA 2012 / SA 2020
STS BB-4 XTRA      390 cc           119 cc            2.350/1.880-1.900  Standard             Standard            SA 2012 / SA 2020
BB-5                           387 cc           119 cc            2.350/1.900             Standard             Standard            SA 2012 / SA 2020

Cylinder Head recommendations:

              CUBIC INCH       COMPRESSION      CAMSHAFT            RPM                     APPLICATION

BB-4                       509 - 555                   13.1 Minimum                    Roller                 4000 - 7500                 Pro Street / Drag Race
STS BB-4 XTRA   565 - 632                   13.1 Minimum                    Roller                 4000 - 7500                  Pro Street / Drag Race
BB-5                       565 - 632                   13.1 Minimum                    Roller                 4000 - 7500                  Pro Street / Drag Race

Flow Chart CFM @ 28" H20

                                           VALVE SIZE    0.200       0.300      0.400       0.500       0.600       0.700      0.800  

BB-4                                            2.300 INTAKE         151              211              261              303              334              361
                                                     1.880 EXHAUST      132              161             188              216               236             252
STS BB-4 XTRA                        2.350 INTAKE         141              206               75               327              382              425              447
4.600 BORE (CNC Ported)       1.900 EXHAUST      122              156              190              222              245              263              276
BB-5                                            2.350 INTAKE         108              150              203              258              309              354              384
                                                     1.900 EXHAUST      77               103               134             167               200             222              238

BASIC EASY ORDER NUMBER:

• STS BB-4 XTRA Bare 119 Chamber 2048000 MAKE OFFER PER 1

• Free shipping 48 states

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