Xcessive Manufacturing


*GS300 -JZS160 ECU's & parts

GS300 - JZS160 ECU's

Availability: In stock

Product Name Price Qty
GS300 '98-'01 ECU Kit
GS300 '02-'05 ECU Kit
XM Fuel Pump Mod - S1 - GS300
XM Fuel Pump Mod - S2 - GS300
GM IAT Sensor Kit with Grommet
GM IAT Sensor Kit with NPT Bung
GM IAT Sensor 16mm



 When you're ready to do a manual transmission swap and run a stand alone in that GS300, we've got the kits to get the job done!  

The Panic Wire jumper to Link ECU is the only solution on the market that does not require any factory wiring to be cut and runs the car from a single ECU, not dual ECU's. This allows the reinstalation of your factory computer at any time.

For full individual product descriptions, see related products in the lower right corner.


  Installation is straight forward, unplug and remove the stock ECU, put the new ECU in the factory box and plug in the jumper, then run the vacuum line from the ECU to the intake manifold. Last is to unplug the MAF and plug in the new Sub harness to the MAF plug on the stock harness. This new sub harness has the Intake air temp and an extra Analog input that can be used for future expansion like fuel pressure, nitrous pressure, oil pressure or external MAP sensor.

  This ECU kit does not run the automatic transmssion!! The car must be manual swapped.

ECU hardware and tuning

  While the ECU case/kit is made by us here at Xcessive and the jumper is made by Panic Wire, the actual circuit board is made by Link ECU. The ECU runs the Link G4+ tuning platform with the PCLink software and interface cable. This means all the supporting Link tuning and products are available.

What it does

  This is a full stand alone ECU with adapter configured to run all the factory gauges and controls on manual tranmission cars. The ECU supports the VVTi as well as future mods like boost without any changes to the ECU or wiring other then tuning. If you want to upgrade injectors, turbo swap, just optimize the stock set up or even do a 1J or 2J GTE swap, just re-tune and go. The Link G4+ based ECU has an onboard 4 bar MAP sensor, so converting away from the MAF is easy, no need to purchase a sensor or add any wiring.

   We send the kit out loaded with a start up map that will get the engine fired up right away already configured for the stock Toyota sensors and 2JZ-GE. Tuning is still required for individual set ups and an E-Throttle calibration is required for proper start up and operation. The start up maps will have an average tune designed to be drivable for most applications to get to a qualified tuner. They do have a 3k rev limit set, while they are easily changed, it is the responsibility of the tuner to be sure the tuning is good enough to do so.

  The ECU can also integrate wide band O2's for easier tuning. Many stand alone wide bands have a 0-5V output wire that can be used for the integration. It's recommended to use a new O2 sensor if you don't know the condition of yours.

 Different years and chassis specs

   We've got two different kits for the GS300 chassis. The first is for the '98-'01, next is the '02 - '05. You MUST select the correct one for your application.

 IAT and MAF jumper 

  Since the new kit does not use the MAF and uses the Link on board MAP instead, we offer three different IAT sensors to go with the MAF sub harness. The push in type sensor is typically for NA cars where a rubber grommet is all that holds it in place, these are the easiest to install in cold pipes and air boxes. The second sensor uses a weld in aluminum bung typically put in charge piping or the intake manifold. We also offer a 16mm threaded sensor that fits in 2JZ manifolds that have the sensor threaded into the side of the plenum typically found on JZ's that ran a MAP from the factory.

Fuel pump control 

  The GS300 has a variable speed fuel pump controller, the new ECU kit will switch the controller on and off based on if the engine is running. It is NOT set up for the variable voltage range as factory. We do this to not risk a lean condition if the voltage output is not scaled correct for your engine or tune. This is a significant risk with turbo motors. Variable voltage can be set up by your tuner. It's important to note that there's a good chance your controller has some age to it and therefore may be a question as to it's reliability when run at full voltage for an extened period of time. We offer two XM pump mods to eliminate the factory controllers risks and expense.

  The first XM fuel pump mod is a direct full power jumper that will turn the pump on with the ignition key in "run", it is NOT switched by the ECU, only the ignition key.

  The second XM fuel pump mod has an integrated relay to switch the pump to full power and is controlled by the ECU.

  Both mods only require you to unplug the factory controller and plug in the XM pump mod, no wiring is required for either mod! Yes, they also work with factory ECU's.

Check out our videos as well!

  IS300 Instalation video, same procedure for GS300.   https://www.youtube.com/watch?v=_r6c8uMR390

  2JZ-GTE swap iin IS300 on the XM dyno.  https://www.youtube.com/watch?v=E4E7ruNkWbs

  IS300 all stock engine and exhaust with XM base map dyno run.  https://www.youtube.com/watch?v=XoCAuKf4skg

Emissions testing

   This ECU kit is not meant to pass emissions tets and does not have emissions rediness protocalls. This is for off road use only.

   The ability to plug into the factory harness without modifications allows you to return to the factory computer at any time with the supporting factory components like injectors and catalytic converters required to meet emissions standards. 

    If you are running dual ECU's, you will need to return your harness to it's original wiring and then just plug in the new ECU to the factory header

Functions include:

Tach, Speedometer, Fuel Level, Oil Light, Check Engine Light, Coolant Temp

Outside temp gauge

Auto Climate control

EVAP purge


Fuel Pump 

Wide Band O2 input assigned to OBD pin 7 for O2 integration - Configurable

Built in 4 Bar MAP

VVTi Control - Programmable

Knock - Programmable

Boost solenoid control

Stock solenoids can be programmed

Can be configured for Cruise Control


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