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Not all S12+8 calipers fit vented rotors!


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Just learned this the hard way. Picked up a set of Toyota 4-runner calipers that were marked s12+8, and being under the impression that all these calipers required vented z31 rotors and machined hub spacers, I bought rotors and spacers. Went to put them together and the calipers ended up being for stock rotors.

 

I always thought that the calipers marked s12 were for stock rotors, and the s12+8 and s12w calipers fit vented rotors, but apparently not!

 

Just a heads up to you unsuspecting buyers. I haven't seen this in any writeups before, and now I'm either stuck with rotors and spacers I can't use or calipers I can't use.

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I'm using 1987 S12+8 calipers on my vented rotors. Pre-1986 calipers are generally for solid rotors, post-1986 are generally vented rotors. They do overlap some in 1986.

 

The S12+8 caliper can utilize the RX-7 pads if they are appropriately modified.

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  • 10 months later...

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