don't forget the 4 or 5 point seatbelts, they are what make the real difference. For convenience in a street/strip car, you can get ringbolts that replace your normal seatbelt retaining bolts, and race belts that clip onto the rings, so you don't need to replace your 3 pointer . On race days just clip on the belts and push the 3 pointer out of the way. Of course you need to add 2 ringbolts for the rear of the 4 points and one on the floor if a 5 point