The Jaguar XJ 4.2 V8 SC 400hp (2003 - 2009) produces 400bhp and 540Nm in standard form. A Stage 1 ECU remap can raise output to 470bhp and 630Nm, a gain of 70bhp and 90Nm, with no hardware modifications required.
Interested in a Stage 1 remap for your Jaguar XJ? Get in touch and we will discuss the best options for your vehicle.
JSM Diagnostics comes to you. Mobile ECU remapping across Medway and the surrounding areas.
Call us: 07711 934 905
Mon – Fri: 8:30am – 5:30pm