Planted Technology seat brackets for the Porsche 928. Part number SB052-4949.
Within the SB052 family, which spans Porsches from 1974 to 1998 on a common seat mounting.
It was meant to replace the 911
Which is the thing that explains the 928 entirely. Porsche designed it as the future of the company: front engined V8, rear transaxle, and considerably more civilised than the 911. It won European Car of the Year, the only sports car ever to do so, and then customers kept buying 911s regardless.
Porsche built it for eighteen years and eventually gave up. That history is why the 928 was cheap for decades and why it is now being reappraised.
Which shapes the seat choice
It is a grand tourer, and most owners cover distance in them. A hard fixed racing shell would undo what the car is good at. Ask us about the more padded options or a reclining seat rather than a fixed bucket.
928 seats have powered adjustment. Tell us the specification.
Have you written anything useful for my car?
Yes: Top 5 reclining seat choices for your Porsche 928, including our fitting guide, and Lexus Planted Technology Frames Updated For 2026. Those are written around the same car, from real fittings and customer questions, so they are worth a look before you decide.
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.
