AC AN Fitting Couplers

See how to install 3" Ram Horn exhaust manifolds on a C/10 with a 406 engine. Learn some tips on welding steel tubing to a cast iron manifold and how they are modified to fit the truck.

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.

What fittings should you use with your brake or fuel system? What does AN and NPT stand for? All of these questions plus more will be answered in Speedway Motors' latest article about fasteners!

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

Using the proper U-joint size is critical to correct fitment and operation of your driveline's driveshaft.

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.

Learn how to mount coil-overs with this guide. We can help you find your spring rate, compensate for mounted angle, and measure your replacement shock.

Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility.

Making great horsepower on a budget is the LS engine family’s claim to fame, but just like any other engine, the more power you ask of it the more you’ll need to spend

Learn how to wire dual electric radiator fans. Use our dual fan wiring diagram and guide to make sure you properly wire your fans to your thermostat.