Tuff Stuff Fittings and Hose

Learn how to successfully upgrade the cooling system for a 400 small block Chevy. Read tips for installing a water pump and auxiliary coolant lines using fittings and fuel hoses.

AN fittings are a simple and effective way to plumb fluid systems in your car. This AN fittings install guide answers some of the more common questions pertaining to AN fittings and AN line.

Hose & Fitting

Learn how to repair an oil line leak using steel braided hose and AN fittings. See how to cut the hose, measure angles, apply fittings and install fuel lines back into your car.

Learn how to use Koul Tools for your AN Hose Assembly with our video guide. Koul Tools make it easy to install a braided rubber hose into the AN fitting socket.

Dick from Koul Tools shares a tip on how to properly seat the AN fittings using the Koul Tools device.

Ever had brand new bolts or nuts bind up on you? Take a minute to read through the steps you should take anytime you’re building an engine or installing new hardware.

Maintain your torque tubes with this quick tip for Speedway Motors.

Learn the proper steps in upgrading your air cleaner assembly to ensure clean air, allowing your engine to more easily make the power that it should.