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"I'm not sure if you have seen this a dyno chart for a hacked muffler. I'm just curious what they exactly did to it, since it's quite an improvement, especially the torque.
-- peer "
The dyno chart shows the difference between a stock oem muffler and a "Sporttech" muffler. I don't think the sporttech is a hacked oem muffler.
"No. They do interact in the middle of the muffler. That first pic is misleading. The left and right inlets connect in the middle; it is straight though from end to end. perforations along that length determine where the gas spills out into which chamber.
boxsterz"
The inlet pipes on my 1998 muffler do not go through from end to end. When inserting a dowel into one side or the other there is an obstruction about 18 inches into the muffler.
You may be correct about the perforations determining which chambers the gasses flow into. There is a difference between the two pictures that were posted. I don't if the first one is from an older muffler.
From the picture Toolpants posted it appears that the perforations would cause the majority of the gasses to flow as I indicated in my ealier post.
John
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