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986 Boxster IPD plenum casting with patent number, dimpled inlet and vacuum fitting - IPD for Porsche 986 Boxster }
Side view of the 986 Boxster plenum showing IPD patent casting and strengthening ribs - IPD for Porsche 986 Boxster }
986 Boxster plenum with O-ring sealed throttle body flange and dimpled interior - IPD for Porsche 986 Boxster }
Inside the 986 Boxster plenum inlet showing the dimpled interior surface - IPD for Porsche 986 Boxster }
Black IPD silicone intake hose included with the 986 Boxster plenum - IPD for Porsche 986 Boxster }
Genuine Porsche electronic throttle body, top view of the butterfly, optional add-on - IPD for Porsche 986 Boxster }
Genuine Porsche electronic throttle body, angled view of the bore and connector housing, optional add-on - IPD for Porsche 986 Boxster }
Dyno chart: 2001 Boxster S 3.2L Tiptronic with IPD plenum and 74mm TB, 219.2 peak WHP and up to 17 lb-ft more torque - IPD for Porsche 986 Boxster }
Dyno overlay of three stock 986 Boxster S baseline runs vs the IPD plenum run - IPD for Porsche 986 Boxster }
986 Boxster IPD plenum casting with patent number, dimpled inlet and vacuum fitting - IPD for Porsche 986 Boxster
Side view of the 986 Boxster plenum showing IPD patent casting and strengthening ribs - IPD for Porsche 986 Boxster
986 Boxster plenum with O-ring sealed throttle body flange and dimpled interior - IPD for Porsche 986 Boxster
Inside the 986 Boxster plenum inlet showing the dimpled interior surface - IPD for Porsche 986 Boxster
Black IPD silicone intake hose included with the 986 Boxster plenum - IPD for Porsche 986 Boxster
Genuine Porsche electronic throttle body, top view of the butterfly, optional add-on - IPD for Porsche 986 Boxster
Genuine Porsche electronic throttle body, angled view of the bore and connector housing, optional add-on - IPD for Porsche 986 Boxster
Dyno chart: 2001 Boxster S 3.2L Tiptronic with IPD plenum and 74mm TB, 219.2 peak WHP and up to 17 lb-ft more torque - IPD for Porsche 986 Boxster
Dyno overlay of three stock 986 Boxster S baseline runs vs the IPD plenum run - IPD for Porsche 986 Boxster

IPD 74mm Competition Plenum for Porsche 986 Boxster / S 2000-2004

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Brand: IPDSKU / Part #: 86174-2.7
$850.00
$850.00
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Subtotal: $850.00
IPD 74mm Competition Plenum for Porsche 986 Boxster / S 2000-2004
Subtotal: $850.00
Not sure it fits? Text us your VINSee all fitment

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Overview

IPD's 74mm Competition plenum for the 986 Boxster and Boxster S replaces the factory part and is designed to run with a larger genuine Porsche 74mm throttle body in place of the stock 68mm unit. IPD recommends the plenum and throttle body together for the biggest gains, which on the 986 come mostly in the midrange where the car is driven most.

Features

  • Designed around a 74mm throttle body upgrade from the factory 68mm
  • Gains felt across the rev range, strongest in the midrange
  • IPD's patented Y-shaped merge in place of the factory T-style air distributor
  • Cast aluminum construction, made in the USA by IPD in Huntington Beach, California
  • Dimpled internal surface designed to keep air moving smoothly through the merge
  • Replaces the factory mid-engine plenum with a direct-fit IPD part
  • Works with exhaust and software upgrades

What's Included

  • IPD cast aluminum plenum
  • Genuine Porsche throttle body when the throttle body add-on is selected

Specifications

  • Brand: IPD Plenums (Innovative Pro Design)
  • Material: Cast aluminum
  • Made in: USA
  • Part # 86174-2.7: 74mm Competition plenum for the 986 Boxster 2.7L; built for the larger Porsche 74mm throttle body.
  • Part # TB0074: Genuine Porsche 74mm throttle body, the size the 74mm Competition plenum is built around.
  • Part # 86174-3.2: 74mm Competition plenum for the 986 Boxster S 3.2L; built for the larger Porsche 74mm throttle body.

Fitment Notes

Pick the plenum that matches your engine and model year. Competition plenums require the larger Porsche throttle body offered as an add-on.

Fitment

Make Model Chassis Year Engine
Porsche Boxster 986 2000-2004 2.7L Flat-6
Porsche Boxster S 986 2000-2004 3.2L Flat-6
Fitment
YearMakeModel
2000–2004PorscheBoxster
2000–2004PorscheBoxster S

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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