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Rear Brake Rotors

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bigger and wider

but for your rear calipers I think they might work-rear brake pads are same as 996

Boxster front pads: 986.351.939.xx

Boxster S front pads: 996.351.939.xx

Boxster and Boxster S rear pads: 996.352.939.xx

Edited by juniinc
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  • 3 weeks later...

Sorry it has taken so long to reply. Got the parts and nothing seems to make sense. I need the collective help of RennTech to help me understand what I am seeing.

Little background. Trying to change to S rotors in the rear of a 2001 2.7L Boxster.

OK, so I go the rotors from DC Auto, the box is marked with P/N 986-352-403-01 and the measurements I took seem to match what they should be (299mm in diameter and 24mm thick). They fit on the hub no problem.

When I go to put the calipers on they do not fit over the rotor. There are four 'studs' each paired up, on the caliper that the rotor does not fit between (does anyone know if these are adjustable?). So I figure I need S calipers after all. I go on e-bay, buy a set and go to put them on. SAME PROBLEM. So now I am confused. I look at the new calipers vs the old and think I might have got screwed on the calipers (they are not red). The part number stamped on BOTH calipers (e-bay purchased and old) is 996.352.421 (.422 for pass side). There is no last two digits. When I look on PeTS on both DC Auto and Pelican Parts these show as being S calipers with the non-S caliper being .423 and .424 for the rears.

So Pets is telling me I have S calipers already, the S rotors seem to be making sense, the auction on e-bay says they are S but nothing is fitting together. Need your thoughs.



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  • 1 month later...

So to confirm you were able to fit your boxster calipers on boxster s rotors?

OK, just had a thought after typing that out and took a second look at the calipers. Looks like the 'studs' are adjustable so I can use a clamp and widen the gap to allow the thicker rear rotor to fit.


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