Ultra XD

Callies is pleased to introduce the Ultra XD connecting rod. This unique patent pending configuration is designed for additional cam to rod clearance in long stroke Small Block Chevy racing engines. In most cases, the XD connecting rod will provide approximately .050″ more cam clearance than our conventional Ultras, and substantially more over many of our competitor’s connecting rods.

To learn more, watch the video – then contact one of the awesome members of our sales staff.

Below is only a partial listing of part numbers.  Please call for additional part number information and availability.

Big Block Ultra XD I-Beam
Description Typical Wt. Part # MSRP
6.700 2.200 825g U18114 $1,602.00
Single BBC XD I-Beam $208.00
Big Block Ultra XD H-Beam
Description Typical Wt. Part # MSRP
6.700 2.200 823g U19114 $1,248.00
Single BBC XD H-Beam $170.00
Small Block XD I-Beam
Description Typical Wt. Part # MSRP
5.850 2.100 648g U18130 $1,602.00
6.000 2.100 656g U18135 $1,602.00
Single SBC XD I-Beam $208.00
Small Block Ultra XD H-Beam
Description   Typical Wt. Part # MSRP
6.000 2.100 647g U19135 $1,248.00
Single SBC XD H-Beam $170.00
LS Ultra XD I-Beam
Description   Typical Wt. Part # MSRP
6.125 2.100 667g U18170 $1,602.00
Single LS XD I-Beam $208.00