Bring new life to your 1989–1993 Dodge 5.9L 12V Cummins with proven first-gen performance parts from Swag Performance Parts. Enhance fuel delivery and RPM range with a 3200 RPM Governor Spring Kit, VE pump tuning parts, and upgraded injectors. Improve airflow and durability using an Exhaust Manifold Fastener Kit and performance cold air intake. For internal upgrades, choose from high-strength pistons and full crate engines engineered for long-term reliability. Whether restoring or building power, this collection supports your 89–93 Cummins with essential components tailored for efficiency, strength, and classic diesel performance.