CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
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
Cylinder Head Recommendations: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
Flow Chart CFM @ 28" H20VALVE 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 1800 Bare 415 cc Intake Runner 2180000 MAKE OFFER PER 1
• PB 1801 Bare 375 cc Intake Runner 2180002 MAKE OFFER PER 1
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