So, employing the top-notch fabricating services of nearby Wehrli Custom Fabrication, a high-quality compound arrangement was built. Ready for something you don’t see everyday? How about an 8.3L Cummins toter home with compounds! Although the customer rolled in to Calibrated Power Solutions’ facility making 430 hp at the wheels, the single S467 on the mechanical 8.3L was a bit laggy with the trailer attached. Compound Turbo 8.3L Motorhome Performance