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IPD Plenums

More Air In, More Air Out

The internal combustion engine is just an air pump. Simply put, the more air you can get in, the more you can get out. The IPD Plenum optimizes the intake system and when coupled with a larger throttle body, helps your engine breath better.

The revolutionary and patented design of the IPD Porsche Plenums improve intake air flow by replacing the factory plastic "T" style design with a more efficient, cast aluminum "Y" design. The IPD Plenums distribute the air flow more effectively by using a true merge collector and reducing pressure drop at the throttle body inlet. This innovative “Y” diversion area of the IPD Plenums split and channel intake air flow reducing air flow turbulence and increasing air flow velocity. This superior and proven design ultimately results in considerably power gains throughout the horsepower and torque curves.

Bottom line, the "Y" design delivers increased power and drivability. The patented "Y" design Plenum offers a lower pressure drop across the merge collector than a conventional/mass production "T" air distributor. Any pressure drop in the intake tract will serve to either back pressure the turbocharger in a forced induction application or to choke intake flow in a naturally aspirated engine. Both scenarios limit the performance potential of the engine.

IPD Plenums have earned the reputation of being the single best “bolt on” performance upgrade you can possibly install on a late model Porsche. The IPD Plenums provide the best power per dollar return in the Porsche after-market industry today. They have been tested, challenged and proven over and over again to deliver the power gains IPD claims.

Every IPD Plenum in our product line goes through a very rigorous and scientific R & D program backed with extensive dyno testing and tuning to deliver the maximum engine output possible. The countless hours we invest testing and tuning each Plenum design, ensures you are getting the highest quality and best performing Porsche performance product on the market.

LN Engineering recommends IPD Plenums paired with GT3 throttle bodies on all engines M96/M97 engines fitted with Nickies sleeves with displacement increases up to 4.2 liters to help take advantage of the increased displacement and performance Nickies offer.

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  1. 981 Boxster/S Cayman/S DFI (3.4L/2.9L) IPD "Competition" Plenum

    SKU: 81482

    $995.00
    After 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 3.4 "S" and 2.9 "Non-S" applications. **The 987.2 Competition 82mm IPD Plenum requires the additional purchase of the 997 GT3 82mm TB.** Learn More
  2. 986 Boxster 2.7L (00-04) IPD Plenum

    SKU: 86174-2.7

    $795.00
    The 2.7 liter 986 Boxster S Plenum provides about the same power gains as with the 3.2 liter S Boxsters, again delivering peak power in the midrange where we enjoy it most. All 986 Boxster IPD Plenum applications are designed to utilize the larger 74mm Porsche throttle body. The combination of the patented "Y" design of the IPD Plenum combined with a larger TB allow for improved air flow and intake air speed. The IPD Plenum is the absolute single best performance mod you can install on a Porsche Boxster. **Note the larger, German throttle body required to fit the larger 74mm “Competition” Plenum.** Learn More
  3. 986 Boxster S 3.2L (00-04) IPD Plenum

    SKU: 86174-3.2

    $795.00
    All 986 Boxster IPD Plenum applications are designed to utilize the larger 74mm Porsche throttle body. The combination of the patented "Y" design of the IPD Plenum combined with a larger TB allow for improved air flow and intake air speed. The IPD Plenum is the absolute single best performance mod you can install on a Porsche Boxster. **Requires upgraded 74mm Porsche throttle body (Additional Charge)** Learn More
  4. 987.1 Boxster/Cayman (2.7L) IPD Plenum with OE 74mm TB

    SKU: 87174-2.7

    $795.00
    The 2.7 liter Boxster Plenum also utilizes the factory OE 74mm throttle body. This version provides power gains throughout the entire power band as well, especially in the midrange. The Boxster Plenum application is recommended for Boxster enthusiasts looking for considerable performance gains without exceeding certain performance thresholds. Learn More
  5. 987.1 Boxster S (3.2L) 05-06 IPD Plenum

    SKU: 87174-3.2

    $795.00
    Porsche introduced the 987 S Boxster with the 3.2 liter engine from the 986 Boxster S. This Plenum version provides impressive power gains throughout the entire power band, especially in the midrange where we enjoy it most. The 74mm Boxster S IPD Plenum and upgraded 74mm (from 68mm) throttle body package is recommended for Boxster S enthusiasts looking for considerable performance gains. Performance gains can be felt throughout the entire power band making the Boxster driving experience even more visceral. **Requires upgraded 74mm Porsche throttle body (Additional Charge)** Learn More
  6. 987.1 Boxster S/Cayman S (3.4L) 07-08 IPD Plenum for OE 74mm TB

    SKU: 87174-3.4

    $795.00
    The 74mm Boxster S Plenum utilizes the factory 74mm throttle body. This version provides impressive power gains throughout the entire power band, especially in the midrange where it's most critical and most enjoyed. The 74mm Boxster S Plenum application is recommended for Boxster S enthusiasts looking for considerable performance gains without pushing the performance envelope to extreme. Max horsepower is 14 and max torque is 12 which all comes in at 5600 RPM. Learn More
  7. 987.1 Boxster S/Cayman S (3.4L) IPD "Competition" Plenum

    SKU: 87182-3.4

    $795.00
    The IPD Boxster "Competition" Plenum was designed to meet the needs of the most demanding Boxster S enthusiasts. The "Competition" Plenum is even larger and utilizes the 997 GT3 82mm throttle body allowing it to deliver even greater air flow and substantial increases in performance. **Requires 82mm Porsche throttle body (Additional purchase)** Learn More
  8. 987.2 DFI Boxster S/Cayman S/R (3.4L) IPD "Competition" Plenum

    SKU: 87482

    $995.00
    The IPD 987.2 Boxster/Cayman "Competition" Plenum was designed to meet the needs of the most demanding Boxster S enthusiasts. The "Competition" Plenums is internally larger and specifically designed to utilized the larger 82mm 997 GT3 throttle body. This new 987.2 Competition Plenum follows in the foot steps of the very successful 987.1 Competition Plenum, which has proven itself to be the absolute single best performance mod that can be installed on any 987.1. The combination of the patented IPD "Y" designed Plenum and Porsche's largest TB yield great performance gains that can be seen and felt throughout the entire power band. **The 987.2 Competition 82mm IPD Plenum requires the additional purchase of the 997 GT3 82mm TB.** Learn More
  9. 996 Carrera S 3.4L IPD Plenum

    SKU: 96174-3.4

    $795.00
    The IPD Plenum delivers impressive horsepower gains of 25 and torque gains of 22 by means of a superior and more efficient design. These gains are mainly felt in the mid range where it is most needed and most enjoyed but performance improvements are realized throughout the entire rev range. Impressive Performance improvements like this will truly transform your Porsche driving experience. Learn More
  10. 996 Carrera S 3.6L IPD Plenum

    SKU: 96174-3.6

    $795.00
    The IPD Plenum delivers impressive horsepower gains of 24 and torque gains of 22 by means of a superior and more efficient design. These gains are mainly felt in the mid range where it is most needed and most enjoyed but performance improvements are realized throughout the entire rev range. Performance improvements like this can be felt in the "seat of your pants" and will truly transform your Porsche driving experience. Learn More
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