BRODIX PB 1803 Cylinder Heads/18 2188102

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 INT./EXH. 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

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• BP PB 1803 Pkg 410 cc Intake Runner 2188102 MAKE OFFER PER 1 

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