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Old 01-22-2017, 11:48 AM   #3
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Join Date: Apr 2007
Location: Bay Area
Posts: 524
you will never get 3.94 whp with only the filter. You will need the the exhaust package to get that. If you observe how they did the dyno they installed the exhaust package first and then the filter. You won't achieve that by installing just the filter alone.
2008 Boxster S PDE2
02 Boxster S Blk on Blk(Stock for the Wife)
88 turbo S (My Toy) slightly modified
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