Callies Ultra Enforcer I-Beam Connecting Rods for LS Engines Ignition Coils We needed a 4L80E automatic

We needed a 4L80E automatic transmission to handle our Whipple supercharged LS7 engines for mixed street and track use

Virtual Switch Panel (replaces the need for physical switches)

Ford and GM transmission kick down levers as well as all necessary vacuum ports

and compressor pulley covers

CNC ported head combinations or complete crate engines like this one:

Callies Ultra Enforcer I-Beam Connecting Rods for LS Engines Ignition Coils We needed a 4L80E automaticAt Borowski Race Engines, we use Callies Ultra rods for a lot of our boosted 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