Collection: 1994-2000 Detroit 6.5L

6.5L Detroit Diesel — Tuning, Exhaust & Fuel

Calibrated tuning, exhaust, and fuel hardware for the 1994–2000 GM 6.5L Detroit Diesel. The 6.5L is a mechanical-era GM diesel; builds focus on fueling, the injection pump and PMD/FSD, airflow, and exhaust. Every part here is matched to your truck and ordered the way you'd build it.

What you need to tune the 6.5L Detroit Diesel

A supported device plus a Dieselr-calibrated tune file — GDP and Chaos Custom Tuning calibrations are also available.

Exhaust

Downpipe-back and turbo-back exhaust in aluminized and stainless. Larger-diameter exhaust lowers EGT and frees airflow as power climbs.

Fuel

FASS, S&S Diesel, Dynomite Diesel, and Dieselr fuel hardware support higher fueling as power climbs.

Compatibility

Organized by confirmed fitment for the 1994–2000 GM 6.5L Detroit Diesel.

FAQ

What do I need to tune a 6.5L Detroit Diesel?
A supported device plus a Dieselr-calibrated tune file.

What fuel upgrade do I need?
Stock-to-mild builds run the factory system; higher power calls for added fuel supply and supporting hardware.