Yeh I know, sorry for the bad news guys. I mean you might get a tad bit of difference but its minimal really. I actually bought my 320 upgrade from a another guy with an s40 t5 who thought the same thing and has gone with a big brake kit. For actual braking gain there really isn't that much difference at all.
Like tracking these brakes, they would last about the same amount of laps. Taking it round the Nuremberg ring, they didn't even last a lap which was annoying considering the cost I put into them
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