BRODIX PB 1803 BBC CYLINDER HEAD/18 2181007

The 18° Pro Stock style cylinder heads from BRODIX are the Big Dukes. The PB 1800 and PB

1801 were the original designs in this legendary series. The PB 1802 is a cast ported version

of the PB 1800 capable of flowing over 480 cfm. The professionals at BRODIX have contoured

each intake port, exhaust port, and combustion chamber to flow its maximum potential out of

the box. The revolutionary PB 1803 cylinder heads from BRODIX feature oval intake ports, CNC

combustion chambers, and use all standard components for the 18° Pro Stock head excluding

the manifold. For the KC PB 1803, BRODIX contacted the best head porters in the business to

incorporate our porting design into a 100% CNC ported masterpiece. The PB 1803 utilizes an

as-cast intake port that delivers outstanding out-of-the-box performance. Copper valve seats

and a 55° seat angle make either head an excellent choice when looking for serious torque and

horsepower. All Big Duke series heads require special pistons, valve covers, head studs, shaft

rockers, and intake manifold.

Package Heads:

• PS CB: VALVE BOWLS BLENDED • PS MI: MATCH INTAKE PORT TO FP 1298 (PB 1800-1802) MATCH INTAKE PORT TO BRODIX MG 2013 (PB 1803) • PS Valve Job: COMPETITION VALVE JOB • Intake Valves: 2.400 X 6.600 o.a.l. - BR 81660, 45° SEAT ANGLE (PB 1800-1802) 2.450 X 6.650 o.a.l. - BR 81665, 55° SEAT ANGLE (PB 1803) • Exhaust Valves: 1.900 X 6.450 o.a.l. - BR 81645, 45° SEAT ANGLE (PB 1800-1802) 1.860 X 6.550 o.a.l. - BR 81685, 55° SEAT ANGLE (PB 1803) • Valve Springs: 1.625 ROLLER VALVE SPRING - MA 221424, 260 lb CLOSED, 790 lb OPEN, 2.100 INSTALLED HEIGHT, .800 MAXIMUM LIFT 1.645 ROLLER VALVE SPRING - CC 948, 315 lb CLOSED, 915 lb OPEN, 2.100 INSTALLED HEIGHT, .850 MAXIMUM LIFT • Retainers: 1.625 10° TITANIUM - MA 23640 1.645 10° TITANIUM - MA 2001 • Valve Locks: 10° JUMBO - CC 611 • Rocker Studs: SHAFT SYSTEM REQUIRED • Valve Seals: 11/32 - US VS529V (1.625 VALVE SPRING) 11/32 - US VS485V (1.645 VALVE SPRING)

Facts And Related Components:

• Torque Heads: 70 ft-lb • Torque Rocker Studs: 40-45 ft-lb • Intake Gaskets: FEL-PRO 1298, COMETIC C5419 (PB 1800-1802) BRODIX MG 2013 (PB 1803, BP PB 1803) • Head Gaskets: 4.540 - FEL-PRO 1017, COMETIC C5433 4.600 - FEL-PRO 1057, COMETIC C5434 • Exhaust Gaskets: FEL-PRO 1412, COMETIC C5418 • Head Studs: ARP 235-4712 (12 pt) • Accessory Bolt Holes Are Drilled • Spark Plug Starting Points: NGK R5671A-10 FOR ALCOHOL NGK R5671A-9 FOR RACING GAS • Spring Pockets: MAY NOT BE CUT ANY LARGER OR DEEPER THAN 1.750 • Valve Angle: 18° AND 4° INTAKE, 9° AND 4° EXHAUST • Angle Milling: NOT AVAILABLE • Flat Milling: .0055 in PER cc • Angle Machining: NOT AVAILABLE • Dowel Shift: NOT AVAILABLE • Pushrod Slots: STANDARD • Rocker Arms: SHAFT SYSTEM - T&D 3036, JESEL KPS 22797 • Lifters: STANDARD • Pistons: STANDARD 18° X 9° VALVE ANGLE • Pushrods: CHECK PUSHROD CLEARANCE WITH HEAD INSTALLED ON THE ENGINE BLOCK BEFORE FINAL ASSEMBLY • 4.375 MINIMUM BORE

Cylinder Head Specifications:

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

PB 1801        375 cc               89 cc                  2.400/1.900                Standard                 PM 1800/PM 1810/PM 1903**/PM 1913**

PB 1800        415 cc               89 cc                  2.400/1.900                Standard                 PM 1800/PM 1810/PM 1903**/PM 1913**

PB 1802       456 cc                91 cc                  2.400/1.900                Standard                 PM 1800/PM 1810/PM 1903**/PM 1913**

PB 1803       413 cc               95 cc                   2.450/1.860                Standard                 PM 1803 / PM 1813 / PM 1903 / PM 1913

BP PB 1803 410 cc         95 cc / 91 cc *          2.450/1.860                Standard                  PM 1803 / PM 1813 / PM 1903 / PM 1913

*Chamber Volume With Stealth Titanium Valves

** Oval Port Manifold MUST Be Port Matched to Fit Rectangular Port Heads

              CUBIC INCH       COMPRESSION    CAMSHAFT        RPM                            APPLICATION

PB 1801        522 - 555              13.5 Minimum                 Roller             4500 - 7500               Pro Street / Drag Race / Truck Puller

PB 1800        540 - 632              13.5 Minimum                 Roller             4500 - 7500               Pro Street / Drag Race / Truck Puller

PB 1802        555 - 632              13.5 Minimum                 Roller             4500 - 7500               Pro Street / Drag Race / Truck Puller

PB 1803        522 - 632              13.5 Minimum                 Roller             4500 - 7500               Pro Street / Drag Race / Truck Puller

BP PB 1803  522 - 632              13.5 Minimum                 Roller             4500 - 7500               Pro Street / Drag Race / Truck Puller  

                                           VALVE SIZE   0.200        0.300        0.400         0.500        0.600         0.700        0.800          0.900

PB 1801 (Hand Ported)   2.400 INTAKE    162             245            312             367             411            442            463

4.500 BORE                    1.900 EXHAUST 129             180            222             269             301            308            315

PB 1800                           2.400 INTAKE     117            184            256             328             391             435            453

4.600 BORE                   1.900 EXHAUST  113            166             211            239              252             259            264

PB 1802                           2.400 INTAKE     135            205             280            351             409             449            480

4.600 BORE                   1.900 EXHAUST  100             151            193             234             265             296            306

PB 1802 (CNC                2.400 INTAKE     156             230            305             361             414             453            476

Combustion Chambers) 1.900 EXHAUST  135             180             219            252             294             306             313

PB 1803 (CNC                2.450 INTAKE    137              217            296             362             418            464             484            490

Combustion Chambers) 1.860 EXHAUST  110             162             204            238              265            288             320            328

BP PB 1803                    2.450 INTAKE     145             224             300             369             425            475             500            515

(CNC Ported)                 1.860 EXHAUST  126             172             211             245             270            318             338            351

BASIC EASY ORDER NUMBER:

• PB 1803 Pkg 413 cc Intake Runner 2181007 MAKE OFFER PER 1 

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