An OMP direct fit subframe for the Audi S3 Mk2. Part number HC838-6553.
Same floor as the 8P A3
The Mk2 S3 is the 8P A3 underneath, which is why this frame carries the HC838 base number. A seat working in an 8P A3 carries over.
The same family covers the Golf Mk5 and Golf Mk6, so the platform reaches further than the badge suggests.
What you are changing, and why
The S3 came with genuinely good seats, so this is not a car where the standard item is the weak point. People fit a bucket here for two reasons: harness compatibility, and getting the hip point down in a car that sits you higher than a track driver wants.
Worth being honest that if neither of those applies to you, the standard S3 seat is hard to improve on for road use.
Seat brand stays your choice
Two bolt patterns on every plate: 345mm by 271mm for Sparco, OMP and Corbeau base mount seats, 405mm by 290mm for Recaro. The multi-hole clusters at each corner are what allow both, and it means an OMP frame accepts a Recaro where a Sparco frame will not.
Fitting and ordering
Steel, base mount, using the mounting points already in the floor, so nothing is drilled.
Sold singly and handed. Order twice for a pair. Tell us whether the factory seats carry side airbags, because on this generation they generally do.
Have you written anything about this exact product?
Yes, we have covered this exact product: Audi S3 Build with Corbeau RRB Reclining Sport Seats. That is first-hand coverage from our own builds and showroom, not brochure copy.
Will this fit my car?
This frame is made for the Audi S3 Mk2. Chassis code and years matter more than the badge, as floor pans change between generations, so if your car sits near a changeover year, send us the registration and we will confirm before you order.
Which seats does it take?
It takes seats drilled 345mm x 271mm (the Sparco and OMP seat pattern) and 405mm x 290mm (the Recaro seat pattern). 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 OMP frames. If more than one person drives the car, budget for the runner. Our guide to sliding runners explains the options and widths.
Base mount or side mount, and does it matter?
This is a base-mount frame: the seat bolts down through its base, the simpler stack that suits seats with a flat bottom and keeps the install low-fuss. Our guide on base mount versus side mount explains the whole fitting stack.
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.
