A Planted Technology seat spacer, quarter inch. Part number PSP.25.
A quarter of an inch sounds like nothing and it is the size most often needed. A spacer goes between the bracket and the seat, and the small ones are not usually about height at all: they are about angle and about clearance.
Where a quarter inch earns its place
Fixing a rub. A competition seat sitting hard against a sill, a seatbelt buckle stalk or a handbrake gaiter needs a few millimetres to clear it, not an inch. Trying to solve that with a bigger spacer raises you unnecessarily.
And correcting rake. Space one end of the mounting and not the other, and you tilt the cushion. A quarter inch at the front or the rear is often the difference between a seat that supports your thighs and one that does not, and it is a complaint people usually put up with rather than fix.
Measure first
Sit in the car with the seat where you want it and take the actual gap. Planted also make 1 inch, 1.5 inch and 2 inch spacers if you need more, and we would rather you ordered the right one than stacked these up.
Specification
Steel, black powder coat, bolt in.
Any change to seat height or angle moves your shoulder line, so reset harness anchor points afterwards.
Have you written anything about this exact product?
Yes, we have covered this exact product: Lexus Planted Technology Frames Updated For 2026, and Customer Car: Subaru Impreza With Corbeau RRS Seats and Planted Technology Brackets. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is car-specific, so match the vehicle in the product name to your exact car and generation. If you are unsure, send us the registration and we will confirm before you order.
Which seats does it take?
Check the bolt pattern in the specification against your seat. The Compatible seats tab above lists what bolts straight on. If your seat is not listed, tell us what you run and we will confirm the fit.
Do I keep fore-and-aft adjustment?
Only with a sliding runner between the frame and the seat, which is a separate part on Planted frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Is this for the driver or passenger side?
Both sides are available on this listing, pick driver or passenger side at the point of order (sides listed are for right-hand-drive cars). Left-hand-drive car? Ask us, as the sides swap over and availability varies by model.