Chevrolet 6.6i V8 (L8T) Tuning
Supported in 3 Chevrolet models, 2018+.
Chevrolet
3 supported 6.6i V8 (L8T) applications
Models With the Chevrolet 6.6i V8 (L8T)
All Supported Chevrolet 6.6i V8 (L8T) Tunes
About Chevrolet 6.6i V8 (L8T) tuning
We tune the Chevrolet 6.6i V8 (L8T) in 3 applications across the Express, Low Cab Forward, Silverado, from 2018+, in gasoline form, with stock outputs of 401 hp. Calibrations are written on AutoTuner for your exact hardware and fuel, then proven on our Dynojet 424xLC2 in Jenison, MI.
This engine runs on: Bosch T93.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.