Neal Chance Unleashes Pro Mod-Inspired 4L80/6L80 Torque Converters

When your résumé includes things like developing the first bolt-together converter, creating the first billet-steel converter, building the first billet-aluminum converter, fashioning the first aluminum billet lockup converter, and pioneering the Limited Slip Billet Converter, it’s safe to say you know a thing or two about transferring horsepower. But Neal Chance Racing Converters isn’t interested in resting on what it’s already accomplished, and in January 2026, the company introduced an entirely new 10.5-inch 4L80/6L80 converter platform.

I know what you’re thinking: plenty of companies produce torque converters for GM’s 4L80 and 6L80. But the pros at Neal Chance built something truly innovative and unique. Rather than starting with recycled cores or rebuilt components, the company developed everything from scratch and included all the best technology from its proven Pro Mod program.

The centerpiece of the company’s 4L80/6L80 Lock Up Bolt Together or Weld Up Racing Converters is an all-new 10.5-inch torque converter platform that’s built with a 10-strut mechanical diode, welded pump and turbine fins, and a billet stator. The converters also incorporate billet pressure plates and billet drive covers, creating a package that’s designed to withstand the demands of serious horsepower. A triple-disc lockup configuration comes standard, while single-disc and five-disc options allow the converter to be tailored to different applications.

Of course, building a converter that can survive enormous horsepower is one thing. Making sure it works with your particular engine combination is another matter entirely. That’s where Neal Chance’s extensive stator development becomes especially interesting. The company has developed nearly 1,000 stator combinations for its big-bore platform, allowing builders to fine-tune converter characteristics around engine output, vehicle weight, gearing, and intended use.

Speaking of use, much of the converter’s hardware and engineering comes directly from combinations subjected to considerably more abuse than the average street car will ever dish out. Neal Chance points to the same fundamental technology used in Jimmy Taylor’s record-setting, 240 MPH run, which is currently the fastest on record for any full-bodied doorslammer.

Even better, beginning in 2027, Neal Chance plans to expand the same high-level architecture beyond the existing 10.5-inch platform with 9.9-, 9.5-, and 8-inch converters. The reason is simple: different engines, power curves, vehicle weights, and combinations require different converter diameters.

Whether you’re building a street-driven LS with a 4L80, a four-digit 6L80 combination, or something considerably more unruly, the goal remains the same: put the right converter behind it and stop worrying about whether it can take the abuse. Hit up the pros at Neal Chance Racing Converters and grab some of the best hardware in the business!