The ultimate upgrade for classic diesels is a Sidewinder turbocharging system. Banks wastegated Sidewinder turbo unleashes gains up to +82 hp and +143 lb-ft torque. You'll hardly recognize Ol' Betsy: with Banks' turbocharging technology onboard, she'll tow up the grade 53% quicker, and provide up to a phenomenal 29% fuel economy improvement at that. No smoke.
