Sparco 500-Series Seatbase Installation Instructions (Tabbed-Style)

Warning! Seats are an integral part of a vehicle's safety system design. OG Racing highly recommends that aftermarket seat installations ALWAYS be performed by a qualified installer. Sparco Motorsports products are designed for use on racing or off-road vehicles and are NOT applicable or intended for street or highway use. Motorsports are dangerous. No warranty or representation is made as to products' suitability for use or ability to protect the user from any injury or death. The user assumes that risk. OG Racing shall not be liable to purchaser or to any third party for any damages arising out of the purchase, installation or use of any item.

Sparco offers seat bases for many vehicle applications. However this does not guarantee that every model Sparco seat will fit in a particular vehicle. Please take the necessary measurements to ensure fitment prior to installation and contact us with any fitment concerns or questions at 1.800.934.9112 or

Note: Sparco 500-Series Seatbase brackets are ONLY compatible with bottom mounting Sparco seats. In order to properly install a Sparco seat in your vehicle, you will need ONE of each of the following, per seat:

For Bottom Mounting (Street/Tuning) Seats:

• 500-Series Seatbase - SP500SBxxx
Sparco Flat-Tabbed Adapter Bracket - SP500
Sparco Slide Mount Kit - SP493
Sparco Bottom Mount Hardware Kit - SP50001

Stock seat removal:

1. Remove existing seat assembly from the vehicle - refer to your vehicle's repair manual for instructions on properly removing the seat and disabling any existing safety equipment. Retain the bolts that fastened the original seat to the floor - these will be reused when installing the seatbase.

2. If you will be using the stock seat belt and the reciever is attached to the stock seat, remove it and save any fasteners and other related parts for reinstallation onto the Sparco seatbase.

Sparco Seat Assembly:

Note: The diagram above shows a driver side base assembly, facing forward.

1. If you are going to use the stock seat belt, attach the stock seat belt receiver to the base using the original hardware. In some cases, a nut for the stock seat belt receiver bolt is necessary to reuse it (not included).

2. Attach the Sparco Slide Mount Kit (SP493) to the Flat-Tabbed Bracket (SP500) using the four 8mm hex socket bolts (tapered Allen head) and four 8mm locking nuts supplied in the 500 kit. The sliding tracks should be attached using a 6mm allen bolt and 13mm locking nut from the hardware kit. Tip: When installing the sliding track, work on the front mounting holes first. Pull up on the release lever and slide the lower portion of the sliding track out to expose the mounting hole. Install the hardware as shown. Repeat the process for the rear mounting holes. Tighten hardware.

3. Line up the slider/bracket assembly with the tubular section of the base in the desired height position. Fasten the tab brackets to the base using the four hex head bolts found in the 500 kit. Leave hardware loose until final fitment. The base assembly is now complete. Tip: If the preferred setting of the height adjustment is at the lowest setting and the tab bracket interferes with the floor or base it may be required to trim/cut the excess material.

4. Line up the slotted holes in the seat adapters with the mounting holes in the bottom of the seat and fasten the new base assembly using the button head bolt found in the 500 kit. Leave hardware loose until final fitment.

5. The finished seat assembly is now ready for a test fit. Make sure the seat has all the proper alignment and clearances preferred by the driver and make marks on the base assembly if necessary. Remove the seat assembly and tighten down all loose hardware.

6. Attach the adjustment bar to each release leaver on the sliding tracks. It may be necessary to bend the bar slightly to properly reach each track. The handle is slightly bent downward to maximize the upward travel. Be sure to install the handle so that it slopes downward. Push the handle all the way down onto the levers. It may be necessary to lightly tap the bar with a rubber mallet in order to get it completely seated.

7. Install the completed seat assembly to the floor of the vehicle using the original hardware. If the sliding tracks feel sticky, loosen the sliding track hardware while the seat assembly is still bolted to the car and slide the unit all the way back and forth a few times to center and realign the tracks. Retighten all bolts.