I'm not sure of any way to find out the hole-to-hole distance of the stock rear spoiler other than going out to you car and measuring it yourself...lol.
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If the hole-to-hole distance is different between your stock spoiler and that eBay one is much different, your best bet is to get body plugs for your stock spoiler holes, and to drill new ones for the new spoiler.
Btw...so nobody has to search on eBay...here's the link:
http://cgi.ebay.com/ebaymotors/ws/e...&satitle=290029847669&fvi=1&item=290029847669
If the hole-to-hole distance is different between your stock spoiler and that eBay one is much different, your best bet is to get body plugs for your stock spoiler holes, and to drill new ones for the new spoiler.
Btw...so nobody has to search on eBay...here's the link:
http://cgi.ebay.com/ebaymotors/ws/e...&satitle=290029847669&fvi=1&item=290029847669