While EFILive is probably the most well-known software, companies such as HP Tuners, PPEI, Calibrated Solutions, and SCT offer programmers that also support custom tuning.

Kory Willis from PPEi, Clint Cannon of ATS Diesel Performance, Diesel Power's KJ Jones, and SEMA's Peter Treydte all check in to lend some insight about the recent emissions storm that has shaken ...