ULTRA Xd Connecting Rods NOW IN STOCK


Ultra Xd Press Release


This unique (Patent Pending) design provides greater flexibility in camshaft selection for your next stroker engine build.  The canted housing design of the Ultra Xd will allow a larger lobe/base circle/lift camshaft to be selected.   By providing greater rod to cam clearance, Ultra Xd rods can improve the performance of your valve train.  Ultra Xd rods are available for LS1, SBC and BBC engine families. Every Ultra rod is machined from premium Timken 4330 steel and are intended for severe duty applications.


Rod bolt torque and stretch data has been updated in the FAQ section of the website.


Please see the FAQ section important updates on Ultra Rods!

Also please remember all Compstar rod specifications are based on Extreme Pressure Lube #3 and Ultra Rod specs are based on ARP Ultra lube.

We want your feedback!

QUESTION: Aside from brand and price point. Which connecting rod design do you prefer in your engine combination. In other words, which design do you feel is best?

To help us track results to this question, check the survey on our Facebook page!


Compstar Introduces A Ford 302 Connecting Rod

Produced from the same heat treated and stress relieved 4340 steel as existing Compstar H beam rods, every detail of this highly stressed component has been carefully analyzed to maximize repeatability and dependability.  Compstar is currently offering the new 302 rod in a 5.400 length with a true 2.123 rod diameter and 1.685 width.  For added strength and improved piston availability, Compstar 302 rods feature a .927 wrist pin bore.   ARP 2000 bolts are also standard equipment.  For more information on this new product contact our experienced technical department for guidance on your next Ford 302 build.

Ford Compstar Connecting Rod

Sneak Peek! Liteweight SBC Ultra Connecting Rods!

Just in time for build season, Callies introduces the Liteweight Ultra connecting Rod.  Designed with weight reduction in mind, but not sacrificing strength, the engineers at Callies, have answered the call for those demanding lighter SBC connecting rods.  These Ultra connecting rods, are currently available in a variety of lengths and pin diameters.  Call our technical department for more information.

RHS LSx Blocks in stock!

Callies now is a stocking dealer for RHS. Currently we have Standard deck (9.240) and tall deck (9.750) blocks in stock. Contact our sales department for price and availability. 419.435.2711

RHS block