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Others Rotating Assemblies
HRC Maximum Effort™ Balanced Race Assemblies
  • HRC Track Smart 4340 forged steel crankshaft
  • HRC forged 2618 pistons
  • HRC Precision Dense Forged connecting rods
  • Pro-Series rod & main bearings
  • HRC True Seal™ Plasma Moly file fit rings.
  • Precision Race Balanced.

1-hrc-maximum-effortg-balanced-race-assemblies-hrcratp383dThese “American” kits feature Howards HRC state-of-the-art Precision Dense Forged Racing Rods w/ARP 2000 capscrew fasteners, HRC Track Smart 4340 forged crank, HRC forged 2618 pistons and a set of HRC True Seal™ plasma moly rings. Howards finishes these kits with a set of race rod and main bearings. Internally race balanced. 


Chev SB w/Flat Top Pistons (10.4-11.7:1 w/64cc)
RATP355F          (355) 350 Main, 4.030 Bore, 3.480” Stroke
RATP356F          (356) 350 Main, 4.040 Bore, 3.480” Stroke
RATP357F          (357) 350 Main, 4.030 Bore, 3.500” Stroke
RATP359F          (359) 350 Main, 4.040 Bore, 3.500” Stroke
RATP383F          (383) 350 Main, 4.030 Bore, 3.750” Stroke
RATP385F          (385) 350 Main, 4.040 Bore, 3.750” Stroke
RATP397F*        (397) 350 Main, 4.040 Bore, 3.875” Stroke
RATP406F          (406) 400 Main, 4.155 Bore, 3.750” Stroke
*1pc rear main.
Chev SB w/Dome Pistons (12.6-13.2:1 w/64cc)
RATP355D         (355) 350 Main, 4.030 Bore, 3.480” Stroke
RATP356D         (356) 350 Main, 4.040 Bore, 3.480” Stroke
RATP357D         (357) 350 Main, 4.030 Bore, 3.500” Stroke
RATP359D         (359) 350 Main, 4.040 Bore, 3.500” Stroke
RATP383D         (383) 350 Main, 4.030 Bore, 3.750” Stroke
RATP385D         (385) 350 Main, 4.040 Bore, 3.750” Stroke
RATP406D         (406) 400 Main, 4.155 Bore, 3.750” Stroke
Options: Rod bolt upgrade (recommended for over 650HP)
                Clevite Bearings (H-Series)
HRC Track Smart™ Race Assemblies
  • HRC Track Smart™ 4340 forged steel crankshaft
  • HRC or SRP/JE forged pistons
  • HRC 4340 connecting rods
  • Clevite H-Series rod & main bearings
  • HRC True Seal™ Plasma Moly file fit rings.

2-hrc-track-smartg-race-assemblies-hrc track-smart-assemblyOur most popular race kits! These kits feature premium American made parts you can rely on. American 4340 steel contains much higher percentages of Nickel and Chromium. These materials are crucial to strength and durability. We start with a Howards Track Smart 4340 forged steel crankshaft, matched with a set of Howards forged 4340 rods and a set of Howards or SRP by JE pistons. We finish these kits with Clevite “H” series rod and main bearings, and a set of HRC Plasma Moly file fit rings. 


Chev SB w/HRC Sport Lite Rods & Flat Top Pistons
RATL355F          (355) 350 Main, 4.030 Bore, 3.480” Stroke
RATL357F          (357) 350 Main, 4.030 Bore, 3.500” Stroke
RATL383F          (383) 350 Main, 4.030 Bore, 3.750” Stroke
RATL406F          (406) 400 Main, 4.155 Bore, 3.750” Stroke
Chev SB w/HRC Sport Rods & Dome Pistons
RATS355D        (355) 350 Main, 4.030 Bore, 3.480” Stroke
RATS357D        (357) 350 Main, 4.030 Bore, 3.500” Stroke
RATS383D        (383) 350 Main, 4.030 Bore, 3.750” Stroke
RATS406D        (406) 400 Main, 4.155 Bore, 3.750” Stroke
Chev LS1 w/HRC Ultimate Duty™ Rods, Mahle Inv. Dome Pistons/Rings & Comp Star Crank
RATB383Li        (383) LS1 Main, 3.905 Bore, 4.000” Stroke
Chev BB w/HRC Ultimate Duty™ Rods & Dome Pistons
RATB468D        (468) 454 Main, 4.310 Bore, 4.000” Stroke
RATB496D(A)   (496) 454 Main, 4.310 Bore, 4.250” Stroke
RATB509D        (509) 454 Main, 4.500 Bore, 4.000” Stroke
RATB540D(A)   (540) 454 Main, 4.500 Bore, 4.250” Stroke
RATB565D(A)   (565) 454 Main, 4.600 Bore, 4.250” Stroke
(A) Features Callies Dragonslayer Crankshaft.
Options: Balancing (plus heavy metal if necessary)
                Tool Steel Pins
HRC Pro Max™ Race Assemblies

3-ProMax-4340-Crankshafts-HRC 403860-6The ultimate kits for your high horsepower needs. These kits feature the top of the line forged parts. Each kit includes a Howards Pro Max™ deep case hardened 4340 crank, a set of Howards Ultimate Duty™ Forged Billet rods and a set of Howards forged dome pistons. These kits also include Clevite “H” series rod and main bearings, and a set of HRC True Seal™ Plasma Moly file fit rings. 


Chev SB Dome (12.6-15.1:1 w/64cc) 
RAPB355D          (355) 350 Main, 4.030 Bore, 3.480” Stroke
RAPB357D          (357) 350 Main, 4.030 Bore, 3.500” Stroke
RAPB377D          (377) 400 Main, 4.155 Bore, 3.480” Stroke
RAPB383D          (383) 350 Main, 4.030 Bore, 3.750” Stroke
RAPB393D          (393) 400 Main, 4.155 Bore, 3.625” Stroke
RAPB406D          (406) 400 Main, 4.155 Bore, 3.750” Stroke
RAPB421D(C)     (421) 350 Main, 4.155 Bore, 3.875” Stroke
RAFR421D          (421) 400 Main, 4.155 Bore, 3.875” Stroke
RAPB434D(C)     (434) 350 Main, 4.155 Bore, 4.000” Stroke
RAFR434D          (434) 400 Main, 4.155 Bore, 4.000” Stroke
RAPB461D(D)     (461) 400 Main, 4.155 Bore, 4.250” Stroke
(C) Designed for use with after market blocks, such as Dart, World, Bowtie, etc.
(D) Designed for use with 9.325” or 9.500” deck after market blocks, such as Dart, Brodix, Rocket, etc (specify deck height). Features HRC flat top pistons (14.25:1 approx.)
Chev BB (Features double keywayed snout) Dome (12.9-13.9:1 w/119cc)
RAFR468D          (468) 454 Main, 4.310 Bore, 4.000” Stroke
RAFR496D          (496) 454 Main, 4.310 Bore, 4.250” Stroke
RAFR540D(F)      (540) 454 Main, 4.500 Bore, 4.250” Stroke
RAFR557D(G)     (557) 454 Main, 4.500 Bore, 4.375” Stroke
RAFR565D          (565) 454 Main, 4.600 Bore, 4.250” Stroke
RAFR572D(H)     (572) 454 Main, 4.500 Bore, 4.500” Stroke
RAFR582D(G)     (582) 454 Main, 4.600 Bore, 4.375” Stroke
RAFR598D(G/H)  (598) 454 Main, 4.600 Bore, 4.500” Stroke
RAFR632D(G/H)  (632) 454 Main, 4.600 Bore, 4.750” Stroke
(F) Also available w/Flat Top (RAFR540F 9.3:1) or Mini Dome (RAFR540MD 10.4:1).
(G) Features Custom Pistons (any CR).
(H) Designed 10.200” deck height.
Ford SB (SVO Mains w/9.500” Deck) Inverted Dome (9.7-10.0:1 w/58cc)
RAPB408FiD       (408) 351C Main, 4.030 Bore, 4.000” Stroke
RAPB418FiD       (418) 351C Main, 4.030 Bore, 4.100” Stroke
RAPB427FiD       (427) 351C Main, 4.125 Bore, 4.000” Stroke
RAPB438FiD       (438) 351C Main, 4.125 Bore, 4.100” Stroke
Ford SB (SVO Mains w/9.500” Deck) Dome (13.4-14.2:1 w/58cc)
RAPB408FD        (408) 351C Main, 4.030 Bore, 4.000” Stroke
RAPB418FD        (418) 351C Main, 4.030 Bore, 4.100” Stroke
RAPB427FD        (427) 351C Main, 4.125 Bore, 4.000” Stroke
RAPB438FD        (438) 351C Main, 4.125 Bore, 4.100” Stroke
Options: Balancing (plus heavy metal if necessary)
               Tool Steel Pins
               Chev SB Crank w/Big Block Snout
Maximum Effort™ Racing Short Blocks Assembled with Race Quality Parts from Howards Racing Components!
  • GM 4-Bolt Block w/HRC Billet Splayed Main Caps - Hand selected 2-piece rear seal blocks (except 395ci). They are parallel decked, align bored, bored and honed with deck plates, oil galleries are tapped, stroker clearanced, race cam bearings and brass freeze plugs. ARP fasteners.
  • HRC Track Smart™ 4340 Forged Steel Crank - Aerospace high nickel 4340 non-twist forging. Precision machined and nitrided.
  • HRC Maximum Effort™ Pistons - 2618 extruded forgings. CNC machined by Ross Pistons. Forced pin oilers. Includes AQ quality pins.
  • HRC Precision Dense Forged Connecting Rods - State-of-the-art ASTM 4260 super strength material. Fracture cap technology. 245,000 psi capscrews.
  • HRC True Seal™ Plasma Moly File Fit Rings
  • Clevite H-Series Bearings
  • Precision Internal Race Balanced

4-maximum-effortg-racing-short-blocks-hrc maximum-effort-short-blockThe question is do you? Do you really want inferior “low nickel” imported parts in your American machine? Imported parts have become popular because of price. But what if you can have American race quality at a price you can afford? Then these are the short blocks for you. Professionally assembled by dedicated experts. Each part is hand scrutinized before balancing and final assembly.

Chev SB
SBTP352F*          (352ci) 4.000” x 3.500” Flat Top (10.3:1 w/64cc)
SBTP355F            (355ci) 4.030” x 3.480” Flat Top (10.4:1 w/64cc)
SBTP355D           (355ci) 4.030” x 3.480” Dome (13.0:1 w/64cc)
SBTP356F            (356ci) 4.040” x 3.480” Flat Top (10.5:1 w/64cc)
SBTP356D           (356ci) 4.040” x 3.480” Dome (13.0:1 w/64cc)
SBTP357F            (357ci) 4.030” x 3.500” Flat Top (10.3:1 w/64cc)
SBTP357D           (357ci) 4.030” x 3.500” Dome (13.0:1 w/64cc)
SBTP359F            (359ci) 4.040” x 3.500” Flat Top (10.5:1 w/64cc)
SBTP359D           (359ci) 4.040” x 3.500” Dome (13.0:1 w/64cc)
SBTP376F*          (376ci) 4.000” x 3.750” Flat Top (11.0:1 w/64cc)
SBTP376D*         (376ci) 4.000” x 3.750” Dome (12.4:1 w/64cc)
SBTP383F           (383ci) 4.030” x 3.750” Flat Top (11.1:1 w/64cc)
SBTP383D          (383ci) 4.030” x 3.750” Dome (12.6:1 w/64cc)
SBTP385F           (385ci) 4.040” x 3.750” Flat Top (11.2:1 w/64cc)
SBTP385D          (385ci) 4.040” x 3.750” Dome (12.7:1 w/64cc)
*Features “New” GM 4-bolt main block (cast cap).
Chev SB w/1-pc Rear Seal
SBTP397F          (397ci) 4.040” x 3.875” Flat Top (11.5:1 w/64cc)
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