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hey guys, i just installed the 2.25" magna flow. after a week today my car started jerking and my engine light kept flashing and now it stays on. when i push the gas pedal the x feels lazy and the engine light starts flashing again. Has anyone experienced this problem and would appreciate if you guys can help, its driving me insane.
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2004 X5 4.4i (current)
2001 ML 430 (retired)
1998 BMW 540 upgraded to M package (retired)
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