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HRC Pro Series Race Assemblies

Pro Series Race Assemblies provide top-of-the-line Howards quality with 4340 forged steel crankshafts, HRC or SRP/JE forged dome pistons, 4340 connecting rods, Clevite H-Series rods and main bearings and TrueSeal Plasma Moly file fit rings.

  • HRC Pro Series 4340 forged steel crankshaft
  • HRC or SRP/JE forged dome pistons
  • HRC True Seal Plasma Moly file fit rings
  • HRC Ultimate Duty 4340 billet connecting rods
  • Clevite H-Series rod and main bearings
Chev. BB Chev. SB
RAFR468D..........(468) 454 Main, 4.310 Bore, 4.000” Stroke

RAPB332D..........(332) 350 Main, 4.030 Bore, 3.250” Stroke

RAPB355D..........(355) 350 Main, 4.030 Bore, 3.480” Stroke
RAFR496D..........(496) 454 Main, 4.310 Bore, 4.250” Stroke

RAPB357D..........(357) 350 Main, 4.030 Bore, 3.500” Stroke

RAFR509D..........(509) 454 Main, 4.500 Bore, 4.000” Stroke
RAPB370D (D) ..(370) 350 Main, 4.030 Bore, 3.625” Stroke
(D) Features Ross Pistons.
RAFR540D..........(540) 454 Main, 4.500 Bore, 4.250” Stroke
RAPB377D..........(377) 400 Main, 4.155 Bore, 3.480” Stroke
RAFR572D (G) ..(557) 454 Main, 4.500 Bore, 4.375” Stroke
RAPB383D..........(383) 350 Main, 4.030 Bore, 3.750” Stroke
RAFR565D..........(565) 454 Main, 4.600 Bore, 4.250” Stroke
RAPB393D..........(393) 400 Main, 4.155 Bore, 3.625” Stroke
RAFR572D (G)....(572) 454 Main, 4.500 Bore, 4.500” Stroke
RAPB406D..........(406) 400 Main, 4.155 Bore, 3.750” Stroke
RAFR572D (G)....(582) 454 Main, 4.600 Bore, 4.375” Stroke
RAPB421D (E) ..(421) 350 Main, 4.155 Bore, 3.875” Stroke
RAFR598D (G) ..(598) 454 Main, 4.600 Bore, 4.500” Stroke
RAFR421D..........(421) 400 Main, 4.155 Bore, 3.875” Stroke
RAFR632D (G) ..(632) 454 Main, 4.600 Bore, 4.750” Stroke
(E) Designed for use with aftermarket blocks, such as Dart,
World, Bowtie, etc.
RAFR638D (G) ..(638) 454 Main, 4.625 Bore, 4.750” Stroke
(G) Features custom pistons by Ross or JE.
  RAPB434D (E) ..(434) 350 Main, 4.155 Bore, 4.000” Stroke
  RAFR434D..........(434) 400 Main, 4.155 Bore, 4.000” Stroke
 

RAPB461D (F)....(461) 400 Main, 4.155 Bore, 4.250” Stroke

(F) Designed for use with 9.325” or 9.500” deck aftermarket blocks, such as Dart, Brodix, Rocket, etc.  Features HRC flat top pistons (14.25:1 approx.)

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