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Purchase IPD Competition Plenum - Cayman/Boxster 981
  • IPD Competition Plenum - Cayman/Boxster 981 SKU: SKU981IPD

    ★★★★★ ★★★★★ 4.5/5 Stars. (2 Reviews)
  • MSRP $1,677.90 $1,395.00

  • Model:

After a very extensive R & D program IPD has launched the new 981 IPD 82mm Competition Plenums. Available only as the "Competition" version for 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 3.4 "S" and 2.9 "Non-S" applications.

The 981 intake is nearly identical to the 987.2 intake. Porsche made a few upgrades with the 981, most notably being that the 981 draws outside air from both driver and passenger air intakes instead of the driver's side only as previously found with all 986, 987 and 987.2 applications. IPD has developed a custom silicone hose designed to perfectly fit the larger 82mm TB and considerably improve air flow.

The new 981 Plenums also benefits from the internal dimpling effect that we are now implementing on all future Plenums. This internal dimpling allows us to control the boundary layer and maximize air flow. Just like a dimpled golf ball travels farther than a smooth golf ball. Controlled turbulent air creates less friction and "tumbles" over a given area more efficiently.

Power gains with the 981 Competition Plenum are virtually the same as with the 987.2 Competition Plenum, putting down 20 horsepower and 16 foot pounds of torque at the wheels. The bulk of the power gains from the IPD Plenum begin around 4000 rpm, continues all the way through to redline and become fully realized in the 6000 rpm range. IPD performance gains stay above both factory power curves throughout the entire rev range.

Comes with a competition IPD Plenum, GT3 82mm throttle body, and rubber adapter Y-hose. Not a factory part, made by IPD.

Fits all 2013-2016 Boxster or Cayman models (including base, "S", GTS, GT4, & Spyder models).

VERY IMPORTANT NOTE: Professional installation required, and throttle body adaptaion is necessary for the best results and peak power. Must be done with a PIWIS tester.  In some cases, aftermarket performance software is required to get peak performance and to remove dash warning lights.

★★★★★ ★★★★★
4.5/5 Stars out of 2 Reviews
IPD Plenum & 82mm throttle body
(Northern Nevada) | February 13th, 2020
Installed this combination on my 2016 GT4, as well as on our 2009 C4S. Doable as a DIY project; several hours on each car, with over half the time spent securing the two piece clamps and rubber boots which connect the intakes to the plenum. Also, with the Cayman I had to spend several hours kneeling in the trunk for engine compartment access. Differences are discernable (more so on the manual GT4 than on the PDK C4S), both in terms of engine intake/exhaust note, and in the mid the mid-high rev range. Definitely a worthwhile improvement on each car.
IPD Competition Plenum and Throttle Body
(Santa Cruz, California) | October 21st, 2016
Just had the IPD plenum and TB installed on my 2014 Cayman S and am still testing it. However, my initial impressions are very favorable. My mechanic and I both feel that the intake "note" has changed and feels much less restricted and seems smoother while climbing through the revs. As is mentioned in the description of this product the most power gains seem to be above 3500 rpm but the engine seems to breathe much better and run smoother even at lower revs. A word of caution, however. On the 981s this installation is really not advised for DIYers. My mechanic had to disassemble the rear trunk to get complete access to the engine and the job took 5+ hours.

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IPD Competition Plenum - Cayman/Boxster 981
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