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This 555ci Big Block beats their 572 by over 100 on both horsepower and torque
drag race cars
Use a standard depth oil pan to maintain ground clearance for street use
Dart block and Manton pushrods)
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Callies Ultra H-Beam LS Connecting Rods Valves This 555ci Big Block beatsAt 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
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