Product Details Home > Product > Product Details Products Details MBRP 4″ INSTALLER SERIES TURBO-BACK EXHAUST SYSTEM|1989-1993 DODGE 5.9L CUMMINS 4WD (FITS STANDARD CABS, EXT. CABS REQUIRE ADAPTER) Part Number: SKU: S6150ALBKSJ Categories: 1989-1993 5.9L 12V Cummins, Exhaust Systems Call us now for our best price (574) 349-4354 Product Description Extra Info: MBRP Exhaust Installer Series, Turbo Back. 4in. Turbo Back; Single Side Exit (4WD only); AL