In his successful effort to quiet race cars without reducing performance, our founder refused to accept the status quo of the day and instead pushed exhaust technology beyond common thinking.
Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.ģ8 years ago, Flowmaster® mufflers were conceived as a solution to a growing problem with sound issues at race tracks in California and beyond. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels.
This convergence of sound waves reduces the sound level as it passes out of the muffler.
The carefully selected taper angle of the exit cone directs and focuses the sound energy back into itself. The increased surface area and angle of the tapered exit cone provides an easy exit for the hot exhaust gases that encourages the flow out of the muffler. This thermal barrier is engineered to deliver much lower exterior case temperatures, allowing the muffler to be placed closer to heat sensitive areas The thermal barrier between the outer core section and muffler case provides a portion of the mufflers sound energy absorption characteristics. Sound waves lose energy in this section through the expansion of the exhaust gases and reflective angles of the cones which direct the waves into the thermal barrier material. This produces a controlled laminar flow pattern, that reduces turbulence inside the muffler. The hot exhaust gases are released and allowed to expand into this section in multiple layers due to the tapered angle of the entry cone. The perforation pattern and entry angle are specifically engineered into each product to provide optimum airflow characteristics.The sound energy is reflected and redirected back into itself as well as into the outer thermal core by the carefully selected taper angle of the entry cone. Hot exhaust gases entering the tapered inlet section are actually accelerated as they pass through the perforated cone into the outer core area. The HP-2 line offers a wide variety of applications from rock crawling to award winning customs. 2.50-inch inlet/outlet diameters, there is a model available to suit your needs. The 409S HP-2 mufflers feature a painted 409S outer shell, and 409S internal construction. Due to their Cool Shell Technology they can be placed in virtually any location under the vehicle. The 409S HP-2 mufflers have a case length of 18-inches and a 4.00 x 5.50 inch width.
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