Dirt track racing will push an engine to its limits due to the demands and horsepower levels that are required. You can’t win a race if you don’t finish, so building an engine with quality parts is important and Callies is here to make that easier. The Ultra Dirt billet crankshafts and Ultra Dirt connecting rods are designed to provide plenty of horsepower lap after lap.

The Callies Ultra Dirt billet cranks were designed specifically for dirt racing applications and are made from a special type of 4330 TimkenSteel. Ultra Dirt billet cranks have a low reciprocating weight, but they are extremely strong, an important trait for dirt track racing engines. Torsional fatigue has been mitigated thanks to the enhanced strength of the crank’s pin arms. The Ultra Dirt’s counterweights have a smaller radial width that saves weight, but this doesn’t impact any balancing characteristics of the crank.

The Ultra Dirt rods use a tapered beam and were created specifically for the naturally aspirated engines used in dirt track racing. Breann Fredritz from Callies provides more details about these robust connecting rods.

“The tapered beam design reduces the overall mass, which in turn means a lighter bob weight and quicker throttle response. They also incorporate an enhanced big end where 7/16 bolts are utilized on the Honda rod journal. This increases clamping loads without the added expense required when using the small 3/8 fasteners. The Ultra Dirt rods are made from the same TimkenSteel 4330 V steel and use the 265 KSI Ultra bolts as any other rod in the Ultra family. These rods are also available with the ARP MP3.5 Bolts and .866 Wrist pins.”

If you’re ready to sling some dirt with even more authority make sure you check out the Callies website right here to learn more about the Ultra Dirt line of cranks and rods.