Page 208 - 2018 Master Catalog

“FSI” 4340 STEEL • Forged SAE 4340 steel, 7/16” ARP 8740 rod bolts, .927” pin size
I-BEAM RODS • Alignment sleeves for precise cap location. Silicon bronze pin bushings
• Sizing performed with the Sunnen Krossgrinding system
• Weight-matched to +/- 1g
• For use in modified pump-gas racing engines
PART NO. LENGTH WEIGHT BOLTS BUSHINGS SLEEVES NOTES APPLICATION
FSI5700B 5.700” 595 12005 B930 10000 --- Small Block Chevy
FSI6000B 6.000” 640 12005 B930 10000 --- Small Block Chevy
FSI6000BST 6.000” 630 12005 B930 10000 Use with 3.875” stroke or longer Small Block Chevy
FSI6250B 6.250” --- 12005 B930 10000 --- Small Block Chevy
FSI61250 6.125” --- 12005 B930 10000 On-center beam for use in LS Chevy LS
FSI6385 6.385” 810 12005 B992 10000 Bushed Big Block Chevy
FSI6800 6.800” --- 12005 B992 10000 Bushed Big Block Chevy
FSI5400F 5.400” --- 12005 B930 10000 O.E. rod journal, .927” pin Ford 289/302
FSI6250B 6.250” --- 12005 B930 10000 2.100” journal, .927” pin Ford 351W
FSI6800 6.800” --- 12005 B992 --- Bushed Ford Big Block

4340 FORGED CAST STEEL
CRANKSHAFTS CRANKSHAFTS
Designed for more demanding applications. Designed to offer reliability and affordability to
the street/strip performance market.
SB CHEVY (2-PC SEAL)
PART NO. STROKE MAIN BALANCE BOBWGHT MATERIAL DESCRIPTION
103503480 3.480” 350 INTERNAL 1855 Cast Steel Must use 5.700” Rod or longer
103503750 3.750” 350 EXTERNAL 1855 Cast Steel Must use 5.700” Rod or longer
103503752 3.750” 350 EXTERNAL 1855 Cast Steel Must use 5.700” Rod or longer, 2.000 rod jrnl
13050375057I 3.750” 350 INTERNAL 1750 Cast Steel Must use 5.700” Rod or longer
435032505700 3.250” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435034805700 3.480” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435035005700 3.500” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435035625700 3.562” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435036255700 3.625” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435037505700 3.750” 350 INTERNAL 1855 4340 Must use 5.700” Rod or longer
435038756000 3.875” 350 INTERNAL 1855 4340 Must use 6.000” Rod or longer
435040006000 4.000” 350 INTERNAL 1855 4340 Must use 6.000” Rod or longer
435041256000 4.125” 350 INTERNAL 1855 4340 Must use 6.000” Rod or longer
4350348057LW 3.480” 350 INTERNAL 1750 4340 Lightweight, ~48 lbs.
4350348057LA 3.480” 350 INTERNAL 1820 4340 Lightweight, ~48 lbs.
SB CHEVY (1-PC SEAL)
103523480 3.480” 350 INT. / EXT. 1855 Cast Steel Internal Balance in front, External in rear
103523750 3.750” 350 EXTERNAL 1855 Cast Steel Use 400 balancer and stock flexplate
10352375057I 3.750” 350 INTERNAL 1750 Cast Steel Late 1-pc. seal, 5.7” minimum rod length
10352375057E 3.750” 350 INT. / EXT. 1855 Cast Steel Late 1-pc. seal, must use 5.700” rod or longer
435334805700 3.480” 350 INTERNAL 1855 4340 5.7” minimum rod length
435337505700 3.750” 350 INTERNAL 1855 4340 5.7” minimum rod length
435338756000 3.875” 350 INTERNAL 1855 4340 Must use 6.000” Rod or longer
SB CHEVY 400
104003750 3.750” 400 EXTERNAL 1860 Cast Steel Must use 5.700” Rod or longer
440034805700 3.480” 400 INTERNAL 1900 4340 Must use 5.700” Rod or longer
440037505700 3.750” 400 INTERNAL 1900 4340 Must use 5.700” Rod or longer
440038756000 3.875” 400 INTERNAL 1900 4340 Must use 6.000” Rod or longer
440040006000 4.000” 400 INTERNAL 1900 4340 Must use 6.000” Rod or longer
440041256000 4.125” 400 INTERNAL 1875 4340 Must use 6.000” Rod or longer
SB CHEVY LS1 / LS6
434636226100 3.622” 24T REL. INTERNAL 1800 4340 Must use 6.100” Rod or longer
434640006100 4.000” 24T REL. INTERNAL 1800 4340 Must use 6.100” Rod or longer

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