MBRP Armor Lite 4" Turbo Back Exhaust 89-93 Dodge 5.9L Cummins 4WD CS-FSIG20SPKG-REAR-LVL-05 The Stage 4 System is

The Stage 4 System is comprised of dual rate coil springs

but don't want to lose the factory exhaust brake

7 Cummins owners that have upgraded their restrictive factory intake manifold and looking to further improve airflow and underhood appearance

All clamping forces are on one axis

Choose between Fuelab

MBRP Armor Lite 4" Turbo Back Exhaust 89-93 Dodge 5.9L Cummins 4WD CS-FSIG20SPKG-REAR-LVL-05 The Stage 4 System isIs it time to give your 1st Gen Cummins some added power and sound? Or is your factory exhaust hanging on by a thread? MBRP has the solution with their aluminized 4" turbo back exhaust systems for the 1989 1993 Cummins.