Shelby Exhaust Valves

Loud when you want it, quiet when you don't! Learn how exhaust cutouts work, manual vs electric models, and which is best for your build.

Learn how to choose the right valve springs for your camshaft, the differences between single and dual valve springs and when to replace them.

Learn how to check and set your engine's valve lashes to prevent and detect engine failure. See steps on removing spark plugs and if they are tuned correctly.

There's more to a performance exhaust system than just headers and mufflers. Selecting the best mid-pipe design and the addition of an H-pipe, X-pipe, or Y-pipe exhaust crossover can free up some inexpensive horsepower.

A guide on how to check piston to valve clearance to prevent interference. See what tools are used to make this process easier.

Check out some cool overhead conversions to the Ford flathead V8 on display in the Museum of American Speed!

Some basic info on the various exhaust options carried by Speedway Motors.

Headers and manifolds differ in design and function. Long tube headers, shorty headers, and exhaust manifolds each have their pros and cons regarding performance and application.

Whether you’re looking for performance improvements or heat reduction, if you decide to wrap your headers, we'll show you the benefits and possible precautions to take before you wrap your exhaust.

That fresh engine deserves all new exhaust bits. Be sure to have a look at our rundown on selecting the best setup for headers, exhaust, and mufflers for your ride here.