Sparco Universal Seat Track Slider

Sparco Seat Track Sliders

Installing a Sparco seat in your street car and you want to be able to adjust the seat position? Sparco seat track sliders let you slide your seat forward and backward like a factory seat. Your race seat's locked in one position without sliders, which sucks if multiple people drive your car or you need to adjust your seating position. The Sparco sliders bolt between your seat rails (or base mounts) and your race seat's side-mount brackets. They've got a double-locking lever that locks both sides of the slider at the same time. Here's the important part: these sliders are for street use only, not racing. They're not strong enough for track use with a harness. If you're building a street car and you want a race seat that adjusts, these sliders work. If you're tracking your car, don't use sliders.

Here's Why You'd Use Sliders (And Why You Wouldn't)

Sliders give you fore/aft adjustment so you can move your seat closer to or farther from the pedals. That's useful if you share your car with someone who's a different height, or if you want to adjust your driving position depending on what you're doing. Without sliders, your seat's bolted in one fixed position. Once it's set, that's where it stays. Most people tracking their cars skip sliders because sliders add weight (5-7 pounds), they add height (your seat sits 1-2 inches higher), and they're not as strong as fixed-mount rails. Sliders can flex or fail under hard cornering or in a crash, especially if you're using a harness that loads the seat differently than a seatbelt. For street cars where you're using a factory seatbelt and you want adjustability, sliders make sense. For track cars with harnesses, fixed rails are safer.

Double-Locking Mechanism Locks Both Sides

The Sparco sliders use a double-locking mechanism. When you pull the adjustment lever, both the left and right side of the slider unlock at the same time. When you let go of the lever, both sides lock simultaneously. That's important because some cheap sliders only lock one side, or the two sides lock at slightly different times. If only one side locks, the seat can twist or shift under load. The double-locking design keeps both sides locked evenly so the seat doesn't move once it's set. The sliders have multiple locking positions (probably 10-15 positions across the adjustment range, Sparco doesn't specify exact number), so you can dial in your seating position in small increments.

Not Rated for Racing or Track Use

Sparco explicitly says these sliders are for street use only, not racing or competition. The sliders aren't designed to handle the forces from hard cornering, heavy braking, or harness loads. When you're using a 4-point or 5-point harness, the harness straps pull on your seat differently than a factory seatbelt does. The harness loads the seat more evenly across the back and shoulders, which creates more force on the seat rails and sliders. Sliders have moving parts and they're not as rigid as fixed rails. Under hard loading, sliders can flex, break, or unlock. That's why serious track cars and race cars use fixed rails with no sliders. If you're doing occasional track days and you're using your factory seatbelt, you can probably get away with sliders. But if you're running a harness and doing serious track work, use fixed rails.

What You Get

• Sparco seat track sliders (pair - left and right)
• Double-locking mechanism (both sides lock simultaneously)
• Fore/aft adjustment (multiple locking positions)
• Designed for street use with factory seatbelts
• NOT rated for racing, competition, or track use with harnesses
• Adds approximately 1-2 inches to seat height
• Adds approximately 5-7 pounds to seat setup

Compatible With

• Sparco side-mount seats with side-mount brackets
• Sparco seat rails and base mounts
• Street cars using factory seatbelts

Not Recommended For

• Track cars with 4-point or 5-point harnesses
• Race cars or competition use
• Dedicated track cars where weight and safety are priorities