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I have 2 different idler pullies from BF. I'm pretty sure one is a 72mm and one is a 76mm. I've been told that the 2.9" SC pulley with the 76mm idler pulley give you the same tension as stock. The nice thing about the BF tensioners is that they will fit on the car without having to grind down the tensioner bracket. They cost $25 each.
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2004 Saab 9-3 Linear @ 9.5 psi. The original boosted Ecotec.
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