Really need before and after which I have not done. However, since I can't seem to find an F10 dyno'd with Eisenmann race, I may do that just to see ( although no internal control unfortunately.) I'm not expecting much from an axle back system.
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Current non-BMW's
20 Jeep Grand Cherokee
03 Cooper S (Maxi Tuned 50bhp)
60 Impala (43k orig mi)
15 Turbo S (Kobb tune and Kline exhaust)
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