Schroth ASM Autofit Pro Harnesses: These will fit E92 (such as the M3) and E82 (such as the 1M or 135i) models. Great for autox and track days they are an easy bolt on install and snap out for of the way for street driving. Works with almost all OEM and aftermarket seats and includes the anti-submarine technology for safety. Both driver and passenger sides included with instructions.
$475 shipped.