4GP VQ37VHR EcuTek Custom Tune

4th Gear Performance EcuTek Custom Tune for the Nissan 370Z & Infiniti G37 & Q50/Q60 VQ37VHR!

Unlock your car’s full potential with our 4GP EcuTek Tune for the VQ37VHR! Experience sharper throttle response, optimized power delivery, and smoother drivability—custom-tailored to your setup. Whether you’re stock or heavily modified, our tune maximizes performance, reliability, and efficiency, giving your VQ engine the edge it deserves. Perfect for both N/A and boosted builds, this is the ultimate way to extract every ounce of performance from your setup.

Included Basic Maps:

• Map 1 | Performance
• Map 2 | Burble

Optional Custom Maps & Features:

• Anti-Theft
• Rolling Anti-Lag
• Adjustable Traction Control
• Adjustable Burble

* Additional custom maps are available via request, however they may be subject to additional charges.

Selecting the correct options for your application is VERY important, so we are here to explain the differences!

Intake & Exhaust Options

Stock Intake & Exhaust refers to either stock air-boxes or the standard aftermarket intakes that have the same MAF piping diameter as the original intake system as well as vehicles with factory catalytic converters and just a cat-back exhaust system.

3" Intakes have oversized intake piping compared to the stock intake system.

Complete Exhaust System is if your vehicle has a complete aftermarket exhaust system equipped with aftermarket catalytic converters. You are responsible for confirming your catalyst system is emissions-compliant.

Forced Induction if for all vehicles that have an aftermarket supercharger or turbocharger kit installed on their vehicle. (Upgraded Fueling option is required for boosted applications)

Fueling System

Stock Fuel System is for vehicles with stock injectors running 91/93 Octane.

Upgraded Fuel System is for vehicles with upgraded injectors and/or those wanting to run E85 or Flex Fuel with an aftermarket kit installed.

Every purchase includes an EcuTek OBDII dongle that you will use to install your custom 4GP tune onto your ECU via EcuTek's ECU Connect app. The EcuTek Bluetooth dongle connects to your OBDII port under your vehicle's dash and provides access to a plethora of features; such as read and reset DTCs (Diagnostic Trouble Codes), data-logging, personalized dashboards, map switching, adjust custom inputs, & more!

Download EcuTek ECU Connect from the app store of your choice.

During the account setup on ECU Connect, please use the exact email you have used to setup your 4th Gear Performance account!

Applicable models:

• 2009-2020 Nissan 370Z
• 2009-2013 Infiniti G37 Coupe & Sedan
• 2014-2015 Infiniti Q40
• 2014-2015 Infiniti Q50 (VQ37VHR 3.7L)
• 2014-2015 Infiniti Q60 (VQ37VHR 3.7L)

* 2008MY Infiniti G37 Coupes are not capable of being tuned via EcuTek. (6MT models can swap to a 2009+ ECU, but 5AT models cannot.)

4th Gear Performance tunes do not disable emissions control systems or any onboard diagnostic (OBD) system. All customers are responsible for ensuring the installed vehicle modifications do not fail to meet emission standards.

Once a 4GP EcuTek Custom Tune is purchased, it cannot be refunded or cancelled. Please contact us if you have any questions prior to purchasing.