Connecting Rods

Callies Ultra connecting rods are produced from extremely clean Timken steel that is formulated to our exact specifications.  This proprietary steel is forged in Trenton, Michigan, and manufactured 100% in our Fostoria, Ohio facility.   Pride in workmanship, and attention to detail are qualities you’ll discover during careful examination of our finished product. Each step of the manufacturing history of every Ultra rod is meticulously maintained by our manufacturing team.  You can be confident of the material and workmanship of these quality components.

Ultra I-Beams are available in our standard weight version for extreme duty racing applications of popular Big Block Chevy, Small Block Chevy, Nissan GTR, and LS1, as well as liteweight versions for select SBC configurations. For superior clamping, a bolt upgrade to Custom Age 625 material is available for all Callies I-Beams.

The Ultra H-Beam configuration was recently added as part of our expanding connecting rod line. Made from the same premium grade Timken material, the Ultra H is designed to satisfy the requirements of the most demanding racing applications.

Callies latest connecting rod innovation is our unique Ultra XD, designed for extra cam clearance on long stroke applications. The canted fastening system allows the use of a larger base circle cam for increased valvetrain stability, more lift using the same base circle, or longer stroke.  See it here.

 

Gallery 2

 

Industry Leading Features Include:

Increased Stroker Clearance – The best bolt to block & rod to cam clearance in the industry for long stoke applications.

Bolt Spotface Gussets – Allow optimized bolt location without loss of strength or defomation of the big end bore.

100% Thread Engagement – Assures no bolt threads are left exposed in the area between the bolt thread and  shank.

Specifically Designed, 260Ksi Ultra Bolts – All Ultra bolts are designed to fit each specific rod. Rolled threads are employed to provide improved engagement for a more consistent clamping load.  Callies provides and recommends the use of ARP Ultra torque lube. For a complete listing of recommended torque & stretch data, please visit our FAQ page.

 

Below are the Ultra connecting rods we currently produce:

Small Block/LS – I Beams Big Block – I Beams
Part # Size B.E. P.E. Total Part   # Size B.E. P.E. Total
U14125 SBC   5.700 456 185 641 U15110 BBC   6.385 572 238 810
U14130 SBC   5.850 461 186 647 U15111 BBC   6.535 577 242 819
U14131 SBC   5.850-SJ 446 182 628 U15113 BBC   6.660 578 245 823
U14132 SBC   5.850-HJ 405 179 584 U15114 BBC   6.700 579 247 826
U14135 SBC   6.000 464 193 657 U15115 BBC   6.750 580 248 828
U14136 SBC   6.000-SJ 450 186 636 U15116 BBC   6.800 581 249 830
U14138 SBC   6.000-LW 438 175 613 U15117 BBC   6.385-SJ 559 238 797
U14139 SBC   6.000-SJ-LW 428 174 602 U15118 BBC   6.535-SJ 566 239 805
U14140 SBC   6.125 466 195 661
U14141 SBC   6.125-SJ 453 190 643
U14143 SBC   6.125-LW 439 177 616 Big Block – H Beams
U14144 SBC   6.125-LW-SJ 429 174 603 Part   # Size B.E. P.E. Total
U14145 SBC   6.200 470 198 668 U16200 BBC   6.385 576 228 804
U14151 SBC   6.250-SJ 457 193 650 U16210 BBC   6.535 579 233 812
U14150 SBC   6.250 469 198 667 U16230 BBC   6.700 585 237 822
U17171 LS1   6.125 467 196 663
U17178 LS1   6.350 472 201 673
Ultra Xd – I Beams
Part # Size B.E. P.E. Total
Small Block/LS – H Beams U18114 6.700-Xd 586 250 836
Part # Size B.E. P.E. Total U18130 5.850-Xd 464 191 655
U16100 SB   6.000 463 182 645 U18135 6.000-Xd 469 196 665
U16101 SB   6.000-SJ 450 179 629
U16300 LS1   6.125 466 185 651
U16301 LS1   6.460 471 190 661 Ultra Xd – H Beams
U16302 LS1   6.350 470 190 660 Part   # Size B.E. P.E. Total
U16303 LS1   6.200-LW 447 177 624 U19114 6.700-Xd 581 235 816
U19135 6.000-Xd 464 182 646

For proper rod bolt torque information please visit our Rod Bolt Torque page.

Please visit our Availability page for our current inventory.