Factors to Consider:
* Sound: Do you want a quiet, mellow rumble, a throaty roar, or something in between? This significantly impacts muffler selection.
* Performance: A well-designed exhaust system can improve horsepower and torque, especially at higher RPMs. This usually involves larger diameter pipes and less restrictive mufflers. However, gains on a stock 355 might be modest.
* Ground Clearance: Consider the height of the exhaust system, especially if you drive on uneven roads or plan any modifications that might lower the car.
* Budget: Exhaust systems range in price from a few hundred dollars to well over a thousand.
* Installation: Some systems are easier to install than others. Consider whether you'll DIY or have a professional install it.
Popular Choices & Types:
* Flowmaster: A very popular brand offering a wide range of mufflers, from relatively quiet (like the Flowmaster 50 Series Delta Flow) to loud (like the Flowmaster American Thunder). They often offer good value for the performance.
* Magnaflow: Known for a smoother, deeper tone than Flowmaster, often described as more refined. They also offer various levels of sound and performance.
* Borla: A high-performance brand known for quality and excellent sound, typically on the more expensive side.
* Dynomax: Offers a decent balance of sound and performance at a reasonable price.
System Components:
A complete dual exhaust system typically includes:
* Headers: These replace the stock manifolds and significantly improve exhaust flow. While not strictly part of the exhaust *system* itself, headers are a crucial upgrade for noticeable performance gains. Consider coated headers to resist rust and corrosion.
* X-Pipe or H-Pipe: These merge the exhaust pipes from both sides of the engine, improving scavenging and potentially increasing low-end torque. An X-pipe generally produces a more aggressive sound.
* Mufflers: These dampen the sound and control exhaust flow. Choosing the right muffler is key to achieving your desired sound.
* Tailpipes: These are the pipes that extend from the mufflers to the rear of the vehicle.
* Connecting Pipes: These are the pipes that connect the various components of the system.
Recommendation:
For a stock 355 Chevy, a system with headers, either an X-pipe or H-pipe, and Flowmaster 50 Series Delta Flow mufflers or similar (Magnaflow's equivalent for a slightly more refined sound) would likely be a good starting point for a balanced combination of sound and performance without being overly aggressive. However, carefully researching specific systems based on your budget and desired sound is crucial before making a purchase.
Before purchasing, I strongly suggest checking online forums and communities specific to your vehicle's year and model for more specific recommendations and user reviews of different exhaust systems. Reading reviews will help you make the best informed decision for your car.
