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Would I be better off putting a stock exhaust manifold back on the truck for low end grunt?
Incidentally, it is useful to avoid confusing backpressure with scavenging. Scavenging is good and backpressure is bad, but the two are often confused.https://vpexhaust.com/exhaust-back-pressure-a-myth/https://youtu.be/jjPeP_Nn2B4This is fact, not opinion. It may be incredibly useful
Incidentally, it is useful to avoid confusing backpressure with scavenging. Scavenging is good and backpressure is bad, but the two are often confused.
You can call it whatever you want, but in my experience on my stock 22RE an opened exhaust that reduced the backpressure too much in the exhaust system definitely decreased the low-end torque. During my face-to-face conversation with a Doug Thorley engineer for about 1 hour, he used the word "backpressure" at least a dozen times and he was specifically referring to the DT Tri-Y design. He also referred to scavenging, pulse waves, velocity, and exhaust gas temperature and density.
I have decided to buy a new header that comes with the 2" down pipe.
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