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That's a STOCK plenum.....the one most guys are goiing for is the RSS Plenum. Do a Google search on RSS Plenum and you can get to the company website. Some of the 996 guys swear it gave them better performance in the 4000-6000 rpm range. Mfletch ran some tests using a GTek and dropped almost a second off his 0-60 time.....others have posted dyno sheets showing an increase. The battle rages on with guys from both sides giving their yea or no.
In small print....(I bought one too for my 99...and am one of the unscientific folks who think it provided some benefit)
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1987 factory Slantnosed 930 Cabriolet/Guard's red
2002 Midnight Blue 996TT X50
1999 Iris Blue 996 (Dash fire burned and totalled 9/07)
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