I'd give at 2 out of 5 on the difficulty level with one being the easiest. Tools and patience is what it comes down to. If you are tuning the car BMS has the plugs, the perfect socket and a gapping tool. If you try to jump in with just the tools in your tool box you may find yourself in a ping as the plug well requires a very thin walled socket.
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2015 F06 M6 Silverstone Metallic II, Individual Full Leather, B&O, Night Vis, CCB, RKAutowerks (CP Rods/Pistons, DI Cams, CF Intakes, Coated DP's & Billet Diff Brace), InfinityAuto Turbo Inlets, Mishi Oil Cooler, JB4, XHP S3, BM S3
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