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Thread: Spacers for Prostars

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  1. 11-28-07, 04:01 PM #1
    BurnTire
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    Do you know what the knurl size is on the ARP's or did you have to drill the holes out some?
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    2004 Cobra, Whipple ,TH-400
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  2. 11-28-07, 04:03 PM #2
    Ethan@S3M
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    I believe it was .625, Im not sure its been a while.
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  3. 11-28-07, 04:10 PM #3
    Ethan@S3M
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    They were 3.5in Arp studs and I bought them from Loper's. Or Bear has them locally for about 5 bucks apiece and they are local as well.
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  4. 12-03-07, 04:47 PM #4
    fourvalvegt
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    if you want the 3.5 inch studs its a .625 knurl they can be found at summit for 12.95 for a set of 5 http://store.summitracing.com/partde...t=ARP-100-7703

    and you need a 39/64 drill bit
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