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where it’s designed to drain
Top end of shell pipe is drawn
With the lower waterneck in the factory position
5 way or a 2 way
Utilizes the factory “surge tank” to prevent fuel starvation
IPD Plenums 981 DFI GT4 / Boxster Spyder (3.8L) Competition Plenum brand_RSP where it’s designed to drainAfter a very extensive R & D program we are proud to launch the new 981 IPD 82mm Competition Plenums. We only offer "Competition" versions of the 981 Plenums which upgrades the factory 74mm throttle body with the larger 997 GT3 82mm throttle body. This combination has proven to be considerably more popular and deliver even more performance. This Competition version will work with both 3. 4L "S" and 2. 9L "Non S" applications. The 981 intake is nearly