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Old August 31st, 2016, 05:17 PM   #2
Senior Member
Join Date: Aug 2004
Posts: 288
The one you have is still on the Interstate web site. Ask them to order it. The Interstate site has the dimensions so with those and the CCA you can compare. Nothing special about a normal battery that Porsche used but, with your modification, easier to find an exact fit. has a chart of sizes and capacities.
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