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Terry,
Can you shine a flashlight and hold a mirror and look into the tail end of your pipes? I found on my original mufflers a restrictor plate with a 1 1/2" X 24" tube welded to it and the same thing at the collector end. The tubes were offset from each other and had lots of small holes drilled into them. My new mufflers from Classic Chambered are 2 1/2" clear passage with lots of small louvers in a spiral pattern along the outside edges. Big difference in exhaust flow. Hopefully your new pipes have the larger pass through. If they do it will drastically change your engine tune A/F mixture and bump your HP and TQ up about 50 points when you get it dialed in.
John
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