All Products

Stainless Steel 3.5 Inch V-Band Clamp* High Quality V-Band Clamp* Stainless Steel* 3.50 Inch* Sold Individually* Warranty On V-Band Clamps Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not...

BESTfit 4 X 60 Inch Aluminized Steel TubeAre you looking to customize your exhaust for the best performance and sound possible? 4 State Trucks offers this high quality straight cut exhaust stack that is made to perform. It is constructed with strong and...

BESTfit DPF Flexible Exhaust Connector, Replaces A04-25922-018Maintain reliable exhaust flexibility on your Freightliner truck with the BESTfit 4 x 15.5 Inch DPF Flex Connector. This high-quality connector includes 1 flex connector, 2 V-band clamps, 2...

BESTfit Chrome Flat Top Style Top Exhaust Stack 6-5 X 68 Inch* High Quality Exhaust Top Stack* Top Cut Style - Flat Top* Made Of Chrome-Plated Steel * 6 Inch OD Stack With Reduced 5 Inch OD Extra Long Inlet* Long Reduced 5 Inch End Measures 7 Inches...

BESTfit Flywheel With 10 Inch Center Opening & 8 Bolt HolesThis BESTfit Flywheel delivers a reliable replacement for Caterpillar 3176, C10, C12, and C13 engines. Fits OEM 4P8515 and features a flat design, 15-inch clutch, SAE #1 size, 10-inch center...

BESTfit Flywheel Housing For Mack E7 & E-Tech Engines* High Quality Flywheel* Made Of Aluminum* For Mack E7 / E-Tech* 7/16 Inch Transmission Mounting Holes* 6 Bolt Side Pads* Sold Individually*** High Quality Aftermarket Replacement Part (Not OEM) *****...

BESTfit Stainless Steel 14.5 Inch Long DPF Flex Connector PipeRevitalize your truck's exhaust system with the BESTfit 5 Inch X 14.5 Inch Bead Flex Connector, specifically designed to replace OE numbers M66-6542-0335 and M66-6132-0320. This...

BESTfit Filter Clamp For DPFThe BESTfit DPF Filter Clamp delivers a reliable solution for keeping your DPF filter securely in place. Replacing part numbers 2871863 and 21445455, this high-quality clamp ensures leak-free operation and proper exhaust...

BESTfit 11.9L Oil Pan Fits Cummins ISXThis high quality 11.9L oil pan fits the Cummins ISX front and rear stump. The oil pan comes with a 1 year warranty.* High Quality 11.9L Oil Pan* Fits Cummins ISX 11.9L* Universal Fit For Both Front And Rear Sump...

BESTfit Front Sump Steel Oil Pan W/ 22 Bolt HolesThis Oil Pan with front sump is made of steel and has 22 bolt holes for mounting. It fits in your Cummins L10, M11, and ISM Diesel Engine Trucks.* High Quality Oil Pan* Front Sump* For Cummins L10, M11,...

BESTfit DPF Exhaust Flex Connector PipeBESTfit's 4 X 11.375 Inch Flex Connector is the top choice for replacing OE numbers M66-6541-0320 and M66-7091-0320, fitting a wide range of Kenworth and Peterbilt trucks. This 4-inch flange flex connector is...

Cummins DPF Gasket By BESTfitPrevent exhaust leaks and maintain proper DPF operation with this BESTfit DPF Gasket for Cummins engines. Built to replace OEM part 2871453, it delivers precise fit and dependable performance. Sold individually, it's the...