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Some ChumpCar teams run RX-7 with rotaries. Even with so-called mufflers, you can identify one from the other side of the track. After just a few hours into an endurance race, the muffler guts are completely burnt out, so they are basically running straight pipes.
At Rd Atlanta this year, one of them was pitted next to us, and we noticed that his exhaust pipe was hanging lower, and lower, and lower. Sure enough, eventually it broke and caught a rear tire on fire. How the heck they didn't just blow up is beyond me.
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2009 Porsche Cayenne Turbo S; 2019 Corvette Grand Sport Coupe; 1998 Porsche Boxster; 1989 Toyota Supra ChumpCar; 1989 Alfa Romeo Spider; 1977 Porsche 911S Targa 3.2L"Bwunhilde II" chimera; 1970 Datsun 240Z 2.9L "dogZilla" project
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