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I'm definitely interested in your experience with the 15% pulley. I hear it's definitely a must-have for pre-2005 cars like mine...
This is a bit unrelated, but in regards to pre-2005 MCS and performance benefits, besides a pulley, a new bypass valve like the one from Detroit Tuned is also a worthy investment to improve throttle response.
The Craven One piece messed up the other night when doing my 15%. The bolt completely stripped out while the pulley was halfway off. Used an impact to back the bolt out and wow is it messed up. Luckily the pulley popped off with some more persuasion. They're refunding my money but man if it wasnt that far then it could've screwed me royally.
OP: Sorry you had a rough go! But great information for others to see! Thanks for the purchase on the Tensioner Stop! Let me know if I can ever be of any assistance in the future!