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From the earlier posts, BPW seemed to be the preferred tuning provider. I realize it is probably very similar to the ESS tune. Perhaps one will give me a discounted price for both an E92 and an F80 tune.
I am too impatient to wait for something "used" to show up; want to wrap this up within 2 weeks. After that further upgrading one of my other cars.
Still hoping for input on whether the ESS X-pipe system is worth the price. Going to try to disassemble the stock exhaust ASAP. If it won't come apart, I may spring for the entire ESS exhaust system which I would order without cats and with 4 resonators.
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2017 M3 DTC * 2013 M3 Manual
2017 330i (Winter beater)
1981 Camaro Z28 - 427 LS3 - 10.94 @126mph
2006 Corvette (streetable track car)
1986 535i "24 Hours of Lemons" also streetable
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