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http://www.m5board.com/vbulletin/e39-m5-e52-z8-discussion/145669-video-bmw-m5-e39-supersprint-headers-ecu-vs-chevrolet-corvette-ls2.html#post1666656 HD: Corvette LS2 vs BMW M5 E39 Headers, cats, exhaust ECU
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http://www.m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/150033-hd-video-porsche-911-gt3-rs-997-vs-bmw-m5-evosport-headers-rpi-scoops.html#post1723679 Porsche 911 GT3 RS (997) vs BMW M5 Evosport headers, RPI scoops etc
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