Turboplus Aircraft Systems Inc.

General Aviation Intercoolers & Engine Upgrade Kits

253.851.1769 Gig Harbor, WA

Piper Seneca Intercooler Kit

Piper Seneca II & III - PA34-200T/PA-34-220T

Piper Seneca with Intercooler

Piper Seneca with Intercooler

Piper Seneca, showing external ducting

Piper Seneca Intercooler, showing external ducting.

Piper Seneca Intercooler

New Induction plenum and NACA duct assembly

Piper Seneca Intercooler

Piper Seneca Intercooler.

Piper Seneca Intercooler

Piper Seneca Intercooler NACA duct

Piper Seneca Intercooler

Piper Seneca Intercooler exit plenum.


The Turboplus Piper Seneca intercooler system

The Turboplus Custom Designed NACA Duct for your airplane provides the most efficient airflow systems to your Intercooler assembly and to the turbocharger. The direct airflow system into the intercooler are proven to be the most effective and efficient way to supply ambient air right at the intercooler installation.  NACA ducts are used worldwide in passenger jets, NASCAR, high performance automobiles and in the aerospace industry.

The Turboplus Piper Seneca II III intercooler systems provide ram air through their custom designed NACA ducts, for both intercooler and induction systems. One NACA duct directs ambient air through their custom designed airbox (with Auto Air Door) directly into the turbocharger.

The Intercooler NACA duct directs ambient air through their custom designed plenum mounted to the intercooler assembly. The NACA ducts create no drag. Turboplus Aircraft Systems, Inc. is the only general aviation aftermarket intercooler kit manufacturer to offer a Five-Year warranty on their intercooler system.

Turboplus Aircraft Systems, Inc. will ship your order to your home, business or any FBO shop of your choosing. Don't fly to us when we can ship to you.


Piper Seneca Intercooler Kit

Intercooler Benefits

  • Up to 83°C/150°F Induction Air Temp. Drop
  • Extended Engine Life
  • Lower Maintenance Costs
  • Full Take-off Power on HOT Days/High Altitude Airports
  • FUEL SAVINGS up to 15%
  • Extended Range
  • Same H.P. with Less M.P.
  • Cooler CHT and Oil Temps Allows Engine Operation Farther from Point of Detonation
  • Engine Critical Altitude Increased
  • Power Correction Chart used when flying with a Turboplus Intercooler System

Intercooler Kit

  • Intercooler with Charge Air Cooling Plenums
  • New Turboplus Induction System with Automatic Alternate Air Door
  • NACA Ducts & Templates
  • Certified Hardware
  • Custom Intercooler Hoses
  • Turboplus and FAA Documents
Optional Equipment (inquire for pricing):

Engine Intercooler Gauge-3 Temps:

  1. Compressor Discharge Temp.
  2. Charge Air Temp.
  3. Differential Temp.

Price: $10,895.00

Labor Hours

Estimated 50 Hours Installation

Printable Product Flyer


SA4180NM - Piper Seneca II & III


Piper Seneca Pressurized Magneto Kit

Magneto Kit Benefits:

  • Reduces High Altitude Misfiring
  • Reduces Possible Engine damage due to Misfiring

Kit Includes:

  • Certified Hardware
  • New Hose Assemblies
  • Fuel Filter
  • Magneto Fittings
  • Hydraulic Fittings

Price: $1895.00

  • Estimated 4 hours installation
  • Part Number:
    4000 (TSIO-360 Series)

STC: SE4177NM - TSIO-360 Series
Installation of Pressurized Magneto System


Piper Seneca 220HP Conversion Kit

Convert your Continental TSIO-360-EB Engine from 200HP to 220HP Operating Limits.

180 Pound Gross Weight Increase!

Note: 1800 Hour Engines Only

Please review STC: SA1797NM for Increased Maximum Weights

STC: SE1796NM Conversion of TSIO-360EB and LTSIO-360-EB engines to the operating limits of the KB engine.   P-Mag and KB Fuel System required

STC: SA1797NM PA34-220T, Installation of Continental TSI0-360-KB and LTSIO-360-KB engine. No intercooler or P-Mag required.

KB Fuel Kit Includes: (overhauled)

  • New Fuel Injectors
  • New Fuel Pump
  • New Throttle Body
  • New Flow Divider
    (Above parts are on exchange basis. Core charge applies.)


Price: $2800.00**

Includes: 220HP Upgrade STC’s ONLY
Requires purchase of: KB Fuel System & Turboplus Pressurized Magneto Kit

Price $1000.00*

Includes: 220HP Upgrade STC’s
Requires purchase of: KB Fuel System, Turboplus Pressurized Magneto Kit & Turboplus Intercooler Kit

Price: $4000.00**

Includes: KB Engine Installation STC, Seneca II
Intercooler Kit NOT Required

Price: $1000.00*

Includes: KB Engine Installation STC, Seneca II

*with purchase of or pre-installed Turboplus intercooler.
**without installed intercooler.

Download a copy of our ICA

It is highly recommended:
To record the critical engine altitude, oil and cylinder head temperatures and fuel flows at given power settings before the intercooler installation. After installation, another “flight test” ensures that engine and aircraft performance adhere to Turboplus Aircraft Systems, Inc. high standards. Post modification flight test data provides a direct "Before and After" comparison of the dramatic improvement in aircraft performance and engine operation. For your convenience, we supply the pre-flight and post-flight performance documents.


Turboplus Aircraft Systems Inc.
Turboplus Aircraft Systems Inc.
4117 35th Ave NW Gig Harbor WA 98335
Jeff Shapiro
253.851.1769 Office

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