To further improve airflow both in and out of the first-gen 5.9L Cummins, it’s hard to beat the performance a BorgWarner S300 turbocharger provides. For affordability and substantially improved top-end flow, the Super Stock 62/71/14 from High Tech Turbo is a sound, bang-for-your-buck option.

Elevate your 1st gen Cummins with Power Driven Diesel’s Power Package for your 1991.5-1993 12v Cummins. Gain 350-400 hp by selecting from each of the following options. (Transmission upgrades not included, but recommended. Shop for a Power Driven Diesel transmission here!)

Im looking for some advice about performance upgrades on my first gen. I have a 90 w250 with 146000 miles, 727 non overdrive trans. So far it has a danny t 2nd stage fuel pin and ive had the pump tuned.

Shop the Best 1st Gen Dodge Cummins Performance Parts & Upgrades. Huge Selection to all the Part that repair and improve the 1989-1993. Free Shipping & Financing.

The ultimate performance upgrade package for your First Generation 12v Cummins diesel truck. This comprehensive package is designed to deliver an incredible boost in horsepower and torque, taking your truck’s performance to the next level.