[thstone]

As I've said before, everything is a trade-off.

Sport seats like the Sparco R333 will provide additional support as compared to the OEM seats but nothing like a Sparco (or any other brand) competition seat.

The other thing to consider is whether you're going to continue to use the 3-pt factory seat belts or add a 5 or 6-point harness? A 5/6-point harness is what keeps your body firmly in that highly bolstered sport or racing seat. Once you've used a 5/6-pt harness, you'll never want to go out on the track with a factory 3-pt ever again.

And if you're going to add a 5/6-point harness, then you'll need a HANS device (or something similar) to protect your neck while your head is flopping around on top of your body that is strapped firmly into the seat.

As you can see, the slippery slope is covered in Mobil 1 0W-40...