About Us

John Gobbels

Owner, Fabricator & Calibrator

In 2012 John started building Overland Vehicles on the Jeep and Toyota Platforms and has extensive experience on Jeep JK, Land Cruiser 80, 100 and 200 Series vehicles.

Along with Overland Builds, John installed and calibrated LSX Engines into Jeep JK platforms using EFI Live and HPTuners to provide emissions compliant and CAN Bus parallel systems running alongside with the GM ECU.

Currently John has been calibrating using VFTuner and HPTuners on the Toyota Platform including 2005-2022 Toyota Tacoma and 2007-2021 Toyota Tundra, 2015-2019 Toyota 4Runner and select other Toyota vehicles.

As a graduate of Calibrated Success, a tuning school focusing on Advanced OEM EFI Calibration, John understands the importance of proper safety margin and best practices.

Justin Hebert

Partner, Lead Calibrator

From the early days of automotive tuning to leading innovations in off-road performance, Justin’s career has been a journey of evolution and passion. He began tuning in the mid-1990s with antiquated analog strategies, long before programmable EFI became mainstream. His initial focus was on custom turbo kits and nitrous systems for Mazda KL series V6 engines—an exciting start to a dynamic field.

By the late ’90s, Justin ventured into the Diamond Star Motors (DSM) platforms, which marked the beginning of EFI tuning for him. The early 2000s brought the Subaru WRX to the US market, and he quickly found his way into the beta testing program of a prominent entity in Subaru Tuning, providing data aiding the development of software packages for their EMS.

In the mid-2000s, he returned to his 4G63 roots with the Lancer Evolution VIII and IX, pushing the boundaries of OEM ECU tuning solutions before open-source solutions became widely available. Justin’s expertise earned him a reputation that led to national contracts and collaborations with various regional performance shops.

The late 2000s introduced a new challenge: Toyota’s off-road platforms. After swapping engines and building out a series of vehicles (a SAS 1988 Toyota 4Runner, a fully OBD-2 compliant 3RZ-swapped 1983 Toyota Pickup, and a 2UZ-FE powered 1995 Pickup), he discovered his passion for Toyota off-roading in all its forms. As commercially available software started to become available for them, Justin worked with the development team at HPTuners to further develop their software suite for the 1GR-FE.

Today, as the Lead Calibrator and head of R&D at Overland Tailor Tuning, Justin continues to push the envelope by developing a wide range of calibrations for Toyota off-road platforms from 2003 to the present. A highlight of his work includes leading the development of the CARB-EO Calibration for the 3rd Generation Tacoma (3.5L). Justin’s role extends beyond tuning; it’s about pioneering solutions and delivering excellence in every project.

Overland Tailor would also like to thank Justin for his years of military service with the U.S. Air Force.

Why Choose Us

What makes an OTT performance tune special

With our custom designed and tested engine and transmission tuning, OTT can tailor a tune that will make you fall in love with your Toyota all over again.

Check Out Our Authorized Retailers for Overland Tuning Calibrations

OTT works with a network of Professionals that retail our Custom Calibrations and can provide the same great level of service. Please reach out to them from the link below.