Cheap Ways to Increase the Horsepower of a Mustang V6


The Ford Mustang has been a hugely popular car for those looking for a distinctly American muscle car experience. It's also a model that is often modified, since it takes so well to additional performance. And that doesn't just apply to the V8-powered Mustang GT, but it also applies to the less-powerful V6 Mustang, which is powered by a 4.0-liter engine. This engine takes to tuning just as well as its V8 cousin.


  • To unleash more power from your Mustang V6's engine, replace the restrictive stock exhaust system with a more free-flowing one. You can start with a good quality Flowmaster muffler. A decent cat-back exhaust, which replaces the exhaust aft of the catalytic converter to retain emissions compliance, will unleash even more power. Another option is installing a tubular header in place of the restrictive stock manifold.

Cold Air Intake

  • The more fresh, cold air your Mustang V6 gets, the more powerful it will be. You can install a cold air intake that replaces the restrictive stock airbox, mass air sensor and stock filter. Expect anywhere from 8 to 15 horspower and a better sounding growl from the engine. For a little more money you can install a high quality K&N filter.

Reprogrammed ECU

  • When it comes out of the factory, a Mustang has conservatively tuned fuel and ignition curves. Though it's one of the more expensive modifications, a re-tuned ECU can result in a dramatic performance improvement.

Underdrive Pulley

  • Another cheap and easy way to free up more power from your engine is to replace the large factory pulleys for components like the fan and power steering with a smaller underdrive pulley from a company like Steeda. The smaller pulleys reduce parasitic drag on the motor and can give your engine a gain of up to 10 horsepower. As an added bonus, smaller pulleys also improve your fuel mileage.


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