SEMA 2025: Heidts Pro-G IRS, IFS For Mopar E-Bodies

It’s hard to imagine a new rear-wheel drive car being built without an independent rear suspension today, but for decades that was the norm. In fact, most Americans didn’t care that they had a solid axle because that performed better at the drag strip. Now, however, independent rear suspensions are the norm and enthusiasts want to enjoy their benefits all the time. Heidts displayed its Pro-G IRS (and independent front suspension) for the 1970-1974 Plymouth and Dodge E-bodies at this year’s SEMA show, so we decided to take a closer look at them.

Heidts’ Pro-G IRS bolts right into Chrysler’s beloved E-bodies and allows you to not only put the power down, but improves cornering immeasurably. It comes with 33 spline CV shafts that are rated to 800 horsepower, Heidts-branded adjustable coilover shocks. It gives you 6-inches of suspension travel and adjustable camber and toe. 

Available options are a Fabricated 9-inch housing, Currie Positrac third member, Wilwood brakes from 12- to 14-inches, and an adjustable splined sway bar. Pricing starts at $10,221 before options.

Naturally, upgrading the rear suspension and not the front will leave you with a fairly unbalanced beast, so we checked out the Heidts independent front suspension for E-bodies while we were at it. Its Pro-G IFS starts at $7,058 and is a complete hub-to-hub front clip. 

It includes tubular control arms, Wilwood brakes, adjustable coilover shocks, 2-inch drop spindles, and power rack-and-pinion steering.