AC Catalytic Converter and Emissions

Is it OK to put Diesel oil in my gas engine? When is diesel oil bad for my car? Do I need to any additives in addition to diesel oil in my gas engine?

Find out how to achieve the correct tire pressure for optimal race car performance.

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.

Jeff K. doesn't just limit his tendencies to the classics. His daily drivers get the special treatment as well. Take his 2015 Mazda6, for example. Among the changes Jeff made was to install a K&N Performance Air Intake kit.

In this Tech Tip, John offers up a couple solutions to a customer on the hunt for a coil over kit for his 2-door Model A.

If you're considering upgrading your classic car's charging system with an generator to alternator conversion, here are some helpful tips.

We look at the basics of performance carburetion and what you need to properly supply your street or race car with enough fuel in this buyer's guide

Does painting your radiator black affect cooling ability or is it an old wives’ tale? If painted properly your cooling system will be fine.

Read this guide on how to create a custom crankcase vent system for a Corvette using a Sure Seal air cleaner assembly kit. Learn how to keep pressure to a minimum and fabricate tubing to ensure a proper fit.

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.