Exhaust Side Exit systems offer a unique and aggressive look for classic muscle cars. This article explores a personal experience with a side exit exhaust setup on a 1966 Chevelle, highlighting installation, sound, fumes, and legal considerations.
One approach involves running 2.5-inch pipes straight back from the headers, supported by hangers attached to the transmission crossmember. Center-offset mufflers are positioned just past the crossmember, followed by a 45-50 degree bend directing the exhaust in front of the rear wheel. Angling the exhaust tip upwards helps prevent fumes from entering the cabin. This setup, implemented on a mildly modified small block engine (stock compression, heads, and a 600 cfm carb), resulted in a quiet idle and moderate noise levels up to 2500 RPM. Fume levels were minimal, even with the windows down.
However, local regulations can impact the legality of side exit exhausts. In New Jersey, for example, exhaust must extend at least 18 inches beyond the last functioning window. A creative solution to pass inspection involved temporarily removing the rear window cranks.
While this specific example pertains to a small block engine, the principles can be applied to larger engines with careful planning. Consulting with an experienced exhaust specialist is crucial for optimizing performance and minimizing potential issues. A 90-degree bend, for instance, is less desirable than a gradual bend due to potential fume entry, aesthetics, and flow restrictions.
A well-designed side exit exhaust system can enhance the appearance and sound of a classic muscle car. Factors to consider include pipe diameter, muffler choice, bend angles, and local regulations. Thorough planning and professional installation are essential for a successful outcome.
