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  • Ultra I-Beam Image
  • Ultra I-Beam

  • Ultra connecting rods are made entirely in the U.S.A. Every Ultra connecting rod is produced from specially formulated TimkenSteel 4330V steel. This material is then precision forged in Michigan and fully machined in our Fostoria, Ohio facility.

    Many geometric nuances have been incorporated into the design of Ultra connecting rods. These design features enhance the Ultra against specific loads and stresses which are applied to connecting rods subjected to high load, high RPM applications. Ultra connecting rods are fastened by high alloy cap screws made specifically for severe duty service by ARP Inc. Produced with rolled threads, these unique bolts offer improved thread engagement for a smoother more consistent net clamping load.  To eliminate deformation and extrusion only AMS 642 bronze alloy is used within the wrist pin housing bore.

    Ultra I-Beams are available in our standard weight version for extreme duty racing applications of popular Big Block Chevy, Small Block Chevy, Chevy LS, Big Block Ford, Small Block Ford, RY45, Ford Modular, Nissan GTR, Buick 3.8, as well as lightweight versions for select SBC configurations. For superior clamping, a bolt upgrade to MP 3.5 material is available for all Callies I-Beam connecting rods.

  • Ultra I-Beam

    Standard Features

    • Available in standard weight and lightweight
    • Bolt upgrade to MP 3.5 material available
    • Produced from specially formulated Timken 4330V steel
    • Fastened by high alloy cap screws made specifically for severe duty service
  • Below is only a partial listing of part numbers. Please call for additional part number information and availability.

    Big Block I-Beam    
    Description   Typical Wt. Part #
    6.385   2.200 812g U15110
    6.535   2.200 820g U15111
    6.660   2.200 823g U15113
    6.700   2.200 826g U15114
    6.750   2.200 828g U15115
    6.800   2.200 837g U15116
    Single BBC Ultra      
             
    BBC Ultra Long Rod    
    7.100   2.200 848g U15270
    7.200   2.200 853g U15280
    Single BBC Ultra Long Rod    
             
    Big Block Small Journal    
    ** Available by special request    
    6.385   2.100 799g U15117
    6.535   2.100 809g U15118
    Single BB 2.100 Journal Ultra    
             
             
    Small Block I-Beam    
    Description   Typical Wt. Part #
    5.700   2.100 642g U14125
    5.850   Honda 580g U14132
    5.850   2.000 629g U14131
    5.850   2.100 648g U14130
    6.000             Honda 586g U14137-3.5
    6.000   2.000 636g U14136
    6.000   2.100 656g U14135
    6.125   2.000 639g U14141
    6.125   2.100 662g U14140
    6.200   2.100 664g U14145
    6.250   2.000 641g U14151
    6.250   2.100 667g U14150
    Single SBC Ultra      
             
    Small Block Light Weights  
    Description   Typical Wt. Part #
    6.000   2.000 600g U14139
    6.000   2.100 613g U14138
    6.125   2.000 602g U14144
    6.125   2.100 616g U14143
    Single SBC Light Weight Ultra    
             
    LS Series I-Beam    
    Description   Typical Wt. Part #
    6.125   2.100 662g U17171
    6.350   2.100 669g U17178
    6.350   Honda 609g U17180-3.5
    6.350   2.100 655g U17179
    Single LS Ultra      
             
    Ford 460-429      
    with Ford Correct Tower Offset these rods are perfectly matched to Ford bore spacing
    Description   Typical Wt. Part #
    6.700   2.200   U15814
    6.800   2.200   U15816
             
    Ford 351 Small Block    
    with Ford Correct Tower Offset these rods are perfectly matched to Ford bore spacing
    Description   Typical Wt. Part #
    6.200   2.100 636g U14845
    6.250   2.100 630g U14850
    6.250   2.000   U14851
             
    RY45    
    6.125   2.000 588g U14844-3.5
             
    Ford Modular    
    These connecting rods are made to accommodate Ford Modular rod journal diameters and widths.  Wrist pin bores are machined for .866 diameters.
    Description   Typical Wt. Part #
    5.933   2.239 642g U14825
             
    Buick 3.8L V-6 (Even Fire)  
    Machined to accommodate model years 1975-2004, having rod journal diameter of 2.249 inch with .906 inch wrist pins. Ultra Buick 3.8 rods are fastened with ARP 7/16 cap screws made of 260 Ksi tensile strength specialty steel.
    Description   Typical Wt. Part #
    5.600   2.249 660g U16500
             
    Nissan VR38 / GTR    
    Precisely manufactured for the VR38 engine.
    Description   Typical Wt. Part #
    6.500   2.205   U15300
    6.500   2.200   U15305
    Single GT-R rod      
    These connecting rods are made to accommodate Nissan rod journal diameters and widths. Wrist pin bores are machined for .905 inch wrist pins. Ultra VR38 connecting rods are fastened with purpose built ARP 7/16 cap screws made of 260Ksi tensile strength specialty steel. 
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  • Ultra I-Beam Image
  • Ultra I-Beam

  • Ultra connecting rods are made entirely in the U.S.A. Every Ultra connecting rod is produced from specially formulated TimkenSteel 4330V steel. This material is then precision forged in Michigan and fully machined in our Fostoria, Ohio facility.

    Many geometric nuances have been incorporated into the design of Ultra connecting rods. These design features enhance the Ultra against specific loads and stresses which are applied to connecting rods subjected to high load, high RPM applications. Ultra connecting rods are fastened by high alloy cap screws made specifically for severe duty service by ARP Inc. Produced with rolled threads, these unique bolts offer improved thread engagement for a smoother more consistent net clamping load.  To eliminate deformation and extrusion only AMS 642 bronze alloy is used within the wrist pin housing bore.

    Ultra I-Beams are available in our standard weight version for extreme duty racing applications of popular Big Block Chevy, Small Block Chevy, Chevy LS, Big Block Ford, Small Block Ford, RY45, Ford Modular, Nissan GTR, Buick 3.8, as well as lightweight versions for select SBC configurations. For superior clamping, a bolt upgrade to MP 3.5 material is available for all Callies I-Beam connecting rods.

  • Ultra I-Beam

    Standard Features

    • Available in standard weight and lightweight
    • Bolt upgrade to MP 3.5 material available
    • Produced from specially formulated Timken 4330V steel
    • Fastened by high alloy cap screws made specifically for severe duty service
  • Below is only a partial listing of part numbers. Please call for additional part number information and availability.

    Big Block I-Beam    
    Description   Typical Wt. Part #
    6.385   2.200 812g U15110
    6.535   2.200 820g U15111
    6.660   2.200 823g U15113
    6.700   2.200 826g U15114
    6.750   2.200 828g U15115
    6.800   2.200 837g U15116
    Single BBC Ultra      
             
    BBC Ultra Long Rod    
    7.100   2.200 848g U15270
    7.200   2.200 853g U15280
    Single BBC Ultra Long Rod    
             
    Big Block Small Journal    
    ** Available by special request    
    6.385   2.100 799g U15117
    6.535   2.100 809g U15118
    Single BB 2.100 Journal Ultra    
             
             
    Small Block I-Beam    
    Description   Typical Wt. Part #
    5.700   2.100 642g U14125
    5.850   Honda 580g U14132
    5.850   2.000 629g U14131
    5.850   2.100 648g U14130
    6.000             Honda 586g U14137-3.5
    6.000   2.000 636g U14136
    6.000   2.100 656g U14135
    6.125   2.000 639g U14141
    6.125   2.100 662g U14140
    6.200   2.100 664g U14145
    6.250   2.000 641g U14151
    6.250   2.100 667g U14150
    Single SBC Ultra      
             
    Small Block Light Weights  
    Description   Typical Wt. Part #
    6.000   2.000 600g U14139
    6.000   2.100 613g U14138
    6.125   2.000 602g U14144
    6.125   2.100 616g U14143
    Single SBC Light Weight Ultra    
             
    LS Series I-Beam    
    Description   Typical Wt. Part #
    6.125   2.100 662g U17171
    6.350   2.100 669g U17178
    6.350   Honda 609g U17180-3.5
    6.350   2.100 655g U17179
    Single LS Ultra      
             
    Ford 460-429      
    with Ford Correct Tower Offset these rods are perfectly matched to Ford bore spacing
    Description   Typical Wt. Part #
    6.700   2.200   U15814
    6.800   2.200   U15816
             
    Ford 351 Small Block    
    with Ford Correct Tower Offset these rods are perfectly matched to Ford bore spacing
    Description   Typical Wt. Part #
    6.200   2.100 636g U14845
    6.250   2.100 630g U14850
    6.250   2.000   U14851
             
    RY45    
    6.125   2.000 588g U14844-3.5
             
    Ford Modular    
    These connecting rods are made to accommodate Ford Modular rod journal diameters and widths.  Wrist pin bores are machined for .866 diameters.
    Description   Typical Wt. Part #
    5.933   2.239 642g U14825
             
    Buick 3.8L V-6 (Even Fire)  
    Machined to accommodate model years 1975-2004, having rod journal diameter of 2.249 inch with .906 inch wrist pins. Ultra Buick 3.8 rods are fastened with ARP 7/16 cap screws made of 260 Ksi tensile strength specialty steel.
    Description   Typical Wt. Part #
    5.600   2.249 660g U16500
             
    Nissan VR38 / GTR    
    Precisely manufactured for the VR38 engine.
    Description   Typical Wt. Part #
    6.500   2.205   U15300
    6.500   2.200   U15305
    Single GT-R rod      
    These connecting rods are made to accommodate Nissan rod journal diameters and widths. Wrist pin bores are machined for .905 inch wrist pins. Ultra VR38 connecting rods are fastened with purpose built ARP 7/16 cap screws made of 260Ksi tensile strength specialty steel. 
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