: Fiberglass (standard) vs. Carbon Fiber (ultralight but much more expensive).
: Most require additional side-mount brackets or vehicle-specific sliders . To give you a better recommendation, let me know: Are these for a real car (track/street) or a sim rig ? What is your budget range per seat? What is the make/model of your vehicle or simulator frame? Go to product viewer dialog for this item. Sparco ADV XT Seat where to buy racing seats
: Check waist size ratings (e.g., Medium fits up to 34", XL up to 38"). : Fiberglass (standard) vs