IAG is a privately owned company that caters to the general population of Detroit metro area motorists and high octane motor junkies...ran by motor car enthusiast Timothy John Sproul jr (TJ)... IAG can and will go beyond all expectations to please each and everyone its our customers....every vehicle is treated as our own and deserves the attention needed to endure the hard driving we are left with on our Michigan roads. We specialize in engine diagnostic and repair, steering and suspension, engine electronics, brakes and some transmission work... custom installation and aftermarket guidance are some of our specialties...