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I have a 2014 MX5 with a Kraftwerks supercharger and I have been slipping the serpentine belt at around 6000 rpm since I installed it in April. I am going to install the 2.5 tensioner and some other pulleys like I have seen suggested. My question is does anyone know if this will work and if you know what brand and part number the belt is. A replacement belt from Kraftwerks is $150 I think that is way to much since I can probably get it from Gates or Dayco for a third of that price. Any info would be greatly appreciated.
Thank you Scott
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You won't find a serpentine belt other than from kraftwerks. When they designed the kit they decided to go with a custom belt that fit the kit rather than designing the kit around an off the shelf belt. This is also why the belt is expensive due to the limited number being made. The original belt with this kit was trouble, as it stretched behind tensioner led and delaminated to failure within several thousand miles. The new belt made by Gates holds up like a belt should. I am running the 2.5 l tensioner on mine and have no slip issues. I would be curious to hear why you think you are getting slip.
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