If you will forgive an interloper. I have 1999 Subaru Forester S Turbo fitted with AP 4 pots and 304 mm discs running 2003 WRX 17 inch wheels. Standard brake back plates were removed which I believe is usual practice. However there is a slight danger I am told that with for example a split CV boot or similar oil leak the rear of the discs can become contaminated. Will Impreza back plate refit the Forester (I assume it does) but also give clearance for AP set up. Which year or are back plates same up to 2005.



CMM
Middlesex - UK

 

Hello,

The largest discs on most impreza's are 297mm so the backing plate will not fit the 304mm discs. The late STI's have discs larger than 297mm so they might fit but you would have to confirm the size with a dealer/breaker/

 

Thanks. Seems logical that STi has a larger back plate. Has anyone used this with an AP kit.

CMM.

 

the rear discs on an sti are 316mm , I dont know if the back plate will fit though

 

Thanks guys. Looks like a case of suck-it-and-see.

CMM.

 

I believe that the discs are positioned further inboard with APs to allow clearance for the thicker disc and calliper to the inner face of the wheel spokes. Therefore I doubt that any oem backplate will fit.

 

Thanks Robin - that would make sense. Might still look at STi. The Brembos must need more clearance than earlier 4 pots.

Chris M.

 

Rear stone guards from the STI won't fit as they are mounted as part of the hub/back plate.
Guards from the Brembo fronts might. At least they should mount the same

 

Thanks to all for their imput. I will investigate STi brake back plates.

CMM