Greg Fletcher
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Jim- whoever mounted those Koni's probably switched to a smaller bolt to accommodate. The Koni mounts have a smaller I.D. than the original JH shock. I used the vernier calipers to check the size of the stock shock mount bolts (still original on my car). The stock bolt diameter comes out to 0.452 O.D. on my car. The Bilstein lower mount appears to be 0.475" I.D. The Bilstein is a product of Germany and I would assume that they are metric. An M12 bolt would have an O.D. of 0.465" and would appear to be an ideal fit if new bolts are required, otherwise an owner should able to get by with the original JH part.
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