2. The Original Design provides for very low backpressure. Less than 25% of the backpressure of the low cost alternative. It's quieter but still has the same "putt, putt" sound!
3. This means more power and a slightly lower operating temperature at full load or high speed. Dyno Tests have shown an 8% increase over the low cost muffler.
4. All tubing is the same size throughout the tube; Mandrill bending is used as originally specified, maintaining the full cross-section at all points along the pipes.