PLM Universal Side Mounts & Sliders: 2-Seat Fitment FAQ
By Aftermarket Car Parts -Private Label Mfg | Published: 2026-11-01
Category: Product Reviews
Straight answers to common fitment questions about PLM universal side mounts and sliders, including seat compatibility, bracket reuse, and adjustment range.
Quick answer
PLM Universal Side Mounts & Sliders are a practical, low-cost way to install two side-mounted aftermarket seats, but they are not a direct bolt-in for every car. You still need to confirm your seat’s side-mount bolt pattern and your floorpan’s bracket requirements before ordering.
What the two-seat kit actually includes
The kit ships as two sets (two pairs) of side mounts and sliders, which is enough hardware for two seats. That is useful if you are swapping both front seats at once, but it also means you should not expect a full bolt-in bracket solution for a specific chassis. The universal sliders provide fore-aft adjustment, while the side mounts attach to the seat shell. You will likely still need vehicle-specific base brackets or adapter plates to connect the sliders to your floorpan.
Seat compatibility: what “universal” really means
PLM lists compatibility with Recaro, Sparco, Bride, and other side-mounted racing seats. In practice, that means the side mounts use a common bolt pattern and slot arrangement, but you must check your seat’s mounting hole spacing and bolt size. Some seats use 5mm or 6mm bolts, and some have wider or narrower side-mount footprints. If your seat has an unusual pattern or requires a specific offset, these universal mounts may need drilling or shimming.
Adjustment range and installation trade-offs
The sliders give you tuneable seat position, but universal sliders often have less precise locking than OEM rails and may sit slightly higher. That can matter for headroom in cars with a low roofline. Also, because the kit is universal, you may need to enlarge or slot mounting holes to align with your base brackets. Plan for extra hardware like grade-8 bolts, washers, and possibly a seat base adapter. If you want a factory-like fit with minimal modification, a vehicle-specific bracket is usually a better choice.
PLM side mounts installation questions answered
- Will these fit my Recaro, Sparco, or Bride seat?
- They are designed for side-mounted racing seats from those brands, but you must verify your specific seat’s side-mount bolt spacing and bolt diameter. Measure the distance between the mounting holes on your seat shell and compare to the slot range on the PLM mounts. If the spacing is outside the slot range, you will need to drill or use adapter plates. Measure your seat’s bolt pattern before ordering; “universal” does not guarantee a direct fit.
- Do I need additional brackets to install these in my car?
- In most cases, yes. These are universal side mounts and sliders, not a vehicle-specific bolt-in kit. You will typically need a seat base bracket or adapter that matches your car’s floorpan. Check whether your car’s original seat base can be reused or if an aftermarket base is required. Budget for vehicle-specific base brackets unless you are replacing an existing universal setup.
- How much fore-aft adjustment do the sliders provide?
- The sliders offer a range of adjustment, but the exact travel depends on how you mount them and your seat base. In general, universal sliders provide enough movement for most drivers to find a comfortable position, but they may not match the full travel of OEM power seats. Test the range before final tightening. Check clearance and adjustment range with the seat installed before you torque all bolts.
- Can I install these without drilling or modification?
- Sometimes, but it depends on your seat and base bracket combination. If the slots align perfectly with your seat and base, you may avoid drilling. However, because the kit is universal, minor slotting or drilling is common. Be prepared to modify the mounts or brackets for proper alignment. Plan for possible drilling; having a drill and metal bits on hand prevents installation delays.
- Are these safe for track use?
- PLM does not supply formal testing or certification data with this kit, so you should not assume it meets any specific racing sanctioning body’s requirements. For track use, check your rulebook and consider professional installation and inspection. For street use, proper torque and grade-8 hardware are essential. Verify safety compliance with your track’s rules; when in doubt, consult a professional fabricator.
Product facts
- PLM Universal Side Mounts & Sliders - Fits 2 Seats: The kit includes two sets (2 pairs) of side mounts and sliders, enough for two seats. You can equip both front seats in one purchase, but you should confirm you have the base brackets needed for each side.
PLM Universal Side Mounts & Sliders - Fits 2 Seats
