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Originally Posted by Navy Horn 16
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Passing a Prius with 469CID of open headers causes some pretty awesome ...
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Even better when said Prius floors it on a 2 lane road when you try to pass. My 3 inch exhaust goes to 2 1/2 to get over the rear end and exists behind each rear tire - pointed directly at whoever I’m passing. (No x pipe)
This topic has been beaten to death. No offense to the muffler shop guy, but I wouldn’t take his word as the ultimate authority on performance.
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1965 Pontiac LeMans. M21, 3.73 in a 12 bolt, Kauffman 461.