X2, and the 6.3/6.4 out preforms the rev 5 x50 too. :fight:
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also because the rev 5 uses more expensive parts than the new 6.3, there were a few really hot (very good) rev 5's that were awesome but thats the case with all RD's, there will always be variance's, good or bad.
Besides you cant get a rev 5 anymore, and even if you can find one who knows the real condition of it. Its safer to get a new 6.3 thats at least equal if not better in detection.
There is allot more to a RD than just pure sensitivity. A car that can go 160mph is int much good if it cant handle the turns anymore. :driver: