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Originally Posted by sperry
I'm also a big fan of the Porterfields. I run the R4's (not the R4-S's) at the track in my StopTechs and love 'em.
However, I still switch over to the Axxis Ultimates for autocross. I've had nothing but good luck w/ the Ultimates for excellent cold grip, and they seem to be pretty gentle on the rotors. The Ultimates dust like crazy though... I had a set on my SVX and they're just too messy for the street. I've switched to the Metal Masters on that car and I'm 10 time happier.
What are the changes to the Axxis pads that are concerning people? I've been using 'em for about 4 years now and never had an issue.
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Look at the R-41 compound in the datasheets I put out.
Extremely high friction rates at street temps.
Theyre just not recommended for temperatures over 600d, which should be within autox use easily.