June 2002
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Better Breathing
Step By Step Exhaust Mods

By: Scott Parkhurst
Photography: Bruce Wayne and the author



When enthusiasts begin choosing a modification plan, their decisions are most commonly based on their budget and the results. Call it horsepower-per-dollar if you'd like, but everyone is trying to get the most bang for their buck, and the exhaust system is always a good place to start.

   One of the main reasons there is so much power hiding in our tailpipes is the need for mass-production. The OEM engineers simply must minimize costs, and this results in exhaust system designs that are less than optimal but often very inexpensive to mass-produce. Luckily, this opens the door for creative aftermarket exhaust companies to design and market better-flowing systems that offer more power potential and more choices for a distinctive sound.

   In the last few years, complete systems have become available for many of the more-popular domestic muscle cars. These systems are available as either complete header-to-tailpipe conversions or as piece-by-piece upgrades that can bolt-in exactly where the factory pipes live, often using the same hangers. This gives enthusiasts the opportunity to upgrade one piece at a time, which is easier on the wallet. We wanted to find out what each piece of a typical late model exhaust upgrade system was worth, so we found an '01 Mustang Cobra and headed out to MagnaFlow Performance Exhaust.

Our Mustang Cobra had the factory exhaust system in place, but the owner has plans to make this a great all around performance car. This popular model has a wealth of aftermarket goodies available, but after getting the suspension lowered, horsepower was next on the list. The power mods will begin with the exhaust system and continue in the future with a centrifugal supercharger. Knowing this will be a blown application, which means the entire exhaust system should be improved upon to minimize backpressure and allow the supercharged powerplant to breathe easier.

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