if you fit race seats you remove the seat belt pretensioners on the ones ive seen.they have fitted a resistor in the pretensioner line to trick the computer into thinking there still there.If possible i would ask if there is a way to keep the pretensioners,if you have a large smash and your insurance company inspect the vehicle they will know there missing and probably will pay out for the car but wont pay for any injuries to yourself because youve removed safety equipment.If you cant keep them with race seats then never mind just thought i would warn you thats all.seats are a peice of piss to fit and you can by resistors from electrical shops if you need one(i can find out the resistance value for when you go and buy a resistor,just let me know)