This video demonstrates how to install three options in the seats. The lumbar support, the heaters and the bracket extensions. As well as the Corbeau 5 pt harness while keeping the factory 3pt seat belts. We also cover how to build an airbag resistor for the change in airbag status. These seats feel great. I took a 1 hour trip and they feel just as comfortable as stock. Now they do keep you in place and you have less wiggle room. To me it does keep my shoulders in quite tight, good for track day but it will take some getting used to for daily driving.
I added some 1/2 inch aluminum spacers onto the seat brackets to raise the seat up. I am 5’7″ and like to sit up high. I replaced the grade 5 Corbeau hardware with grade 5 3/8 studs and nylon locking washers. These seats weigh just a bit less than the factory setup after you add all the options and 5pt harness. The passenger seat is 3 lbs less and the driver seat is 10 lbs less for a 13 lb total.
Here is an install video that covers in detail the install of the heaters, lumbar, and bracket extras and modifications, as well as the 5pt harness in conjunction with the factory seat belts.