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wow. that's really a lot bang for the bucks.
I had installed both parts, too but didn't check the gains on the dyno.
This stuff doesn't really help during daily driving as power gain starts in the range of 4500+ but it's really worth the bucks.
Had my car with the Macht Schnell Stage II as well as the pulleys several times on the Nordschleife or other track days and never had any problem - it's a rock solid bold on mod.
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