Callies Ultra H-Beam LS Connecting Rods Valves 300 hp which covers naturally-aspirated

300 hp which covers naturally-aspirated

Capable of 130 PSI while providing significant flow (full high speed)

drag race cars

Spark Only

Callies Ultra H-Beam LS Connecting Rods Valves 300 hp which covers naturally-aspiratedAt Borowski Race Engines, we use Callies Ultra rods for a lot of our LS engine builds. Why? Because they survive where others don't. Callies developed the Ultra connecting rod with the design goal of an uncompromised strength to weight ratio. Every Ultra connecting rod is produced from specially formulated Timken Steel 4330 and precision forged for uniform grain flow and consistency. Many geometric nuances are incorporated into the design of Ultra