If you already have a JWT ECU, and need to upgrade injector size, or intake setup, a simple Eprom Chip is needed. JWT's engine control units (ECUs) are used worldwide in all forms of competition. Specializing in Nissan/Infinity ECUs, JWT programs have earned a reputation for meticulous and complete tuning. An ECU contains much more than just the parameters for a single maximum-horsepower point. Tuning only in this single dimension - without regard for other attributes like throttle response, thermal control, or torque - simply is not optimized tuning! Our winning experience in off-road, rally, and road racing is present in every fully optimized ECU we offer. JWT engine control units are sold on an exchange basis and can be upgraded using your stock unit or we can send a finished unit on an exchange basis(Core Charge).

If you're sending cores in 1st, please send them to:

Jim Wolf Technology INC.
c/o CZP Order #(Insert your order number here)
212 Millar Ave
El Cajon CA 92020

JWT Core Charge($250): An Additional $250 Core Charge applies to all JWT EPROMs, and is charged at initial purchase of EPROM. Once the Customer receives the new JWT EPROM, they must then return their original JWT EPROM to receive their core amount ($250). The additional core charge will not show up on the internet invoice.