ENGINE BLOCKS AND HARDWARE – SMALL BLOCK

A. Cast Iron “R3” Race Engine Blocks
Building on our heritage, the R3 race block family offers the latest in design technology along with the options to meet your specific needs. All of these blocks feature:
• Process-controlled castings utilizing high-strength cast iron and a computer-controlled stress relieving process
• 100% CNC machining with full statistical process control
• Thick deck surface and 6-bolt cylinder head attachment (48° blocks) for improved sealing and reliability
• Rough bore at 3.900" with various options that provide over-bore capacities up to 4.220" (in siamesed-bore versions)
• Various options that provide deck height potentials of 8.900” to 9.560"
• Tappet angles in both 59° (stock) and 48° (improved valve train geometry) are available (59° blocks are not recommended for use with roller tappets)
• Thicker main webbing and pan rail for improved rigidity
• 4-bolt mains in ductile iron, billet
• 318/340 main journal size
• Machined for pre-Magnum head oiling, as well as engine mounts
*P4876381AB Cast Iron “R3” Race Engine Block — Siamese
*P4876793AC Cast Iron “R3” Race Engine Block — Siamese
*P4876673AC Cast Iron “R3” Race Engine Block — Siamese
*P4876791AC Cast Iron “R3” Race Engine Block — Siamese
*P4876671AC Cast Iron “R3” Race Engine Block — Siamese
*P5007360AB Cast Iron “R3” Race Engine Block — Siamese
*P4876674AC Cast Iron “R3” Race Engine Block — Non-Siamese
*P4876795AB Cast Iron “R3” Race Engine Block — Non-Saimese
*P4876792AC Cast Iron “R3” Race Engine Block — Non-Siamese
*P4876672AC Cast Iron “R3” Race Engine Block — Non-Siamese

B. Cast Iron “R4” Race Blocks
These siamese-bore short deck, high nickel alloy Cast Iron Race Blocks are cross-drilled for improved cooling between bores. Blocks are stress relieved, shot peened and machined for 60 mm roller cam bearings. They are 100% CNC machined and utilize optimal valve train geometry. They feature small main bearing size (2.25" journals) and 4-bolt main caps. Blocks are available with either the P5 or Wedge head bolt pattern.
*P5007270AC Cast Iron “R4” Race Engine Block-Wedge Heads
*P5007151AC Cast Iron “R4” Race Engine Block-P5 Heads

A. Gear Drives
Eliminate chain-induced cam timing fluctuations with Mopar Performance single idler gear drive system.
P5249956 Gear Drive-Use without Fuel Pump Eccentric
P5249758 Gear Drive (Fuel Pump Eccentric P4120484)
*P4120484 Moly-Coated Fuel Pump Eccentric (Small Block)


CRANKSHAFTS

B. Forged Crankshafts
Surface hardened, forged Small Block cranks feature radiused fillets at main and rod journals. Each features a 6-bolt flange and is forged from 4340 steel.
*P5007252 Forged Crankshaft — 4.00" Stroke (318/340 Main)
*P5007254 Forged Crankshaft — 4.00" Stroke (360 Main)














CAMSHAFTS

C. Race Roller UGL Camshafts
The 48° tappet “R” blocks (R1, R2, R3, R4) and the 48° tappet aluminum blocks require special cams. These UGL (unground lobe) cams can be provided to cam grinders to enable them to grind their specific cam profiles to create a finished cam. Cannot be used in engine as is.
*P5007437 Race Roller UGL Camshaft-Roller Tappets, for 60 mm Roller Bearings P5007361 (R Blocks)
*P4876633 Race Roller UGL Camshaft-Roller Tappets, for Babbitt Bearings P4876374 (R Blocks)
*P4876634 Race Roller UGL Camshaft-Flat Tappets, for Babbitt Bearings P4876374 (R Blocks)
*P5007932 NEW! Race Roller UGL Camshaft-Roller Tappets, 50 mm Roller Bearings P4876707 (R Blocks)

P5 COMPONENTS

R4/P5 Racing Gasket Set (Not Pictured)
This Racing Gasket Set was designed and engineered for NHRA ProStock Truck competition. Exclusively for R4/P5 combination.
P5007452 Racing Gasket Set-Up to 4.180" Bore (R4/P5 Heads)

D. P5 Hemi® Aluminum Cylinder Head
This semi-machined head (requires machining and porting) features high-quality aluminum casting. Designed for race applications. Special features include a unique valve cover design, 5/16" valve stem size, unique 6-bolt cylinder head mounting design for improved sealing, and unique valve angles (10° intake, 2° exhaust). For use with “R4” cast iron block (P5007151) and A-4 4-cylinder block (P5007467).
*P5007509AB P5 Hemi® Aluminum Cylinder Head
VALVE COVERS

A. P5 Valve Covers
Aluminum Valve Cover Set for P5 Hemi® Cylinder Heads.
P5007642 Aluminum Valve Cover Set (P5 Hemi Heads)
P5007218 Valve Cover Gasket Set 1/M O-Ring Style (P5 Hemi Heads)


B. W8 Valve Cover Set
These distinctive magnesium Valve Covers are designed exclusively for use with Mopar Performance W8 Cylinder Heads. Sold as a pair.
P4876699 Magnesium W8 Valve Cover Set (W8 Heads)
P4876401 Valve Cover Gasket Set (W8 Heads)
P4876676 Valve Cover Stud Attaching Kit (W8 Heads)


TRANSMISSION COMPONENTS

C. RWD Valve Body Assembly
Manual shift turbo action. RWD Valve Body Assembly eliminates 2–3 shift overlap. Fits all 1966–76 Mopar Performance transmissions and 1966–83 non lockup reverse pattern. For race use only.
*P4007291 RWD Valve Body Assembly (1966-83 A-727)





INTAKE MANIFOLDS

D. Race Single Plane Intake — 4-bbl
*P5007420 Aluminum Single Plane Intake-4-bbl Carb, Rectangle Port, 9.000" Deck (W7/W8/W9 Heads)






HEMI® PROSTOCK

A. Hemi® ProStock Block
Full skirt design cast iron block with Mopar/Hemi® logos castin. Features include 4.90" bore centers, 9.28" deck height and 5 aluminum cross-bolted main caps. Block has a 6-bolt head design, 5 bolts and 1 stud in the tappet chamber. Cylinder bore range is from 4.65" to 4.70" and more. Block requires aluminum front seal plate (P5007137) and aluminum rear seal plate (P5007138).
*P4876887AB Rough Bored Hemi Prostock Engine Block
P5007137 Aluminum Front Seal Retainer Plate (Hemi Prostock)
P5007138 Aluminum Rear Seal Retainer Plate (Hemi Prostock)


B. Hemi ProStock Heads
Now you can power up with the same cylinder heads used on the Mopar-sponsored Stratus currently running in the NHRA ProStock series. Heads are made of heavy-duty 355 aluminum and feature a 6-bolt head pattern. Both ports are designed with material for porting and the intake ports point straight at carbs. Valve alignment is E-I-I-E-E-I-I-E. Head uses individual rocker shaft system. Oil drain is located at each end of the head. Requires finish machining and porting.
*P4876883AB Hemi Prostock (NHRA) Cylinder Head-4.90" Bore Center
*P5007135 Hemi Prostock (IHRA) Cylinder Head-5.00" Bore Center
*P5007178 Hemi Pro Mod (IHRA) Cylinder Head-5.00" Bore Center

Composition Material Head Gaskets (Not Pictured)
Thick, 0.040” to 0.042”, Composition Head Gaskets that can be used for replacement or competition applications up to 12.5:1 compression ration. Sold as an engine set.
P5007459 Cylinder Head Gaskets-Up to 4.700” Bore (Hemi Prostock)
A. Aluminum Front Seal Retainer Plate
P5007137 Aluminum Front Seal Retainer Plate
(Hemi® ProStock)

B. Aluminum Rear Seal Retainer Plate
P5007138 Aluminum Rear Seal Retainer Plate (Hemi ProStock)

C. Cast Magnesium Valve Covers
Cast Magnesium ProStock Valve Covers with cast-in Hemi logo are designed for Hemi ProStock heads only. Single plug design (sold individually).
P5007300 IHRA Valve Cover-5.00" Bore Center (Hemi ProStock)
P4876884 NHRA Valve Cover-4.90" Bore Center (Hemi ProStock)


D. Ignition Wire Set
Ignition Wire Set is specifically designed for P5 and ProStock Hemi cylinder head applications.
P5007248 Ignition Wire Set (P5 Hemi)