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Why doesn't my factory truck exhaust have a drone?
The factory system eliminates in-cab drones by creating significant back pressure, which tightly stacks the exhaust pulses, thus minimizing the drone. However, this approach reduces engine performance and increases under-hood temperatures, leading to decreased exhaust manifold life. This method is still used in a majority of other aftermarket systems, which is why they see no performance gain compared to the stock configuration.
Our patented pulse chamber balances exhaust pulses, enabling us to open the exhaust to the optimal size for maximizing engine efficiency while maintaining a quiet, drone-free experience, as demonstrated by our unmatched dyno results.
What's the difference between an "H-Pipe" and Our Pulse Chamber?
The term "H-pipe" refers to a short pipe that connects both sides of an exhaust system, typically positioned perpendicular to the exhaust flow, forming an "H" shape. This design was widely used in vehicles from the late 1950s to the 1980s, with the belief that it would enhance low-end torque by balancing the exhaust flow between the two engine banks. However, while the H-pipe could offer some benefits in this area, it also introduced drawbacks. The turbulent flow within the H-pipe often led to more restrictions, which would reduce performance. Additionally, H-pipes provided minimal help in reducing in-cab noise or droning.
At MPI, we've addressed these limitations with our patented Pulse Chamber design. This innovative approach eliminates the turbulence and restrictions commonly found in H and X pipe configurations. After conducting thousands of tests, we've achieved a design that not only maximizes performance but also guarantees no droning. Our Pulse Chamber ensures a smoother, more efficient exhaust flow, providing a clear advantage and no need to worry about the false claims of other options.