XJS upgr ades / MODIFICATIONS
has developed and tested a range of modifications for the Jaguar XJS. It recommends renewing the steering rack bushes with polyurethane, which helps to tighten up the steering considerably without losing ride quality and they seem to last forever. It charges £220 to fit these bushes to the XJS.
KWE also recommends replacing the gearbox mounting bush on the 5.3-litre #V12
XJS with polyurethane because the standard rubber mount is known to wear. Total cost supplied and fitted comes to £180.
KWE’s favoured size of wheel and rubber is 16in genuine Jaguar wheels with 225/55 x R16 #Falken-ZE914
or Michelin Sport tyres.
For the best power and economy, #KWE
fits a #Hayward-and-Scott
exhaust system with tubular exhaust manifolds (around £3,500). It has also found AJ6 Engineering’s TT exhaust or large-bore system (£2,000-£3,500) provides a noticeable increase in power. It favours #AJ6
Engineering’s Plus Torque kits (around £3,000, fitted) for better power and torque, which includes a super-enhanced (SE) modified ECU, larger throttle bodies and upgraded air filters. KWE also offers cold air intakes for the 5.3-litre V12 (£700 fitted).
For the optimum engine performance, KWE recommends changing the #ECU
for a programmable unit to make the most of other engine modifications. Budget for around £8,000 for this conversion, which, in some cases, includes upgrading the engine wiring and sensors.
On the exterior, KWE recommends upgrading the headlamps to HID or gen 2 LEDs (£220 to £340). Inside, it can fit LEDs with green filters for the main dashboard illumination (£80), and fit a modern stereo system with a DAB radio and Bluetooth connectivity for around £400 (speaker upgrades using JL Audio components and KWE door skin speaker mounts cost around £450). To make the most of the stereo upgrades, or to simply reduce road and engine noise, KWE can replace the sound deadening material in the floors with a modern material from the likes of Dynamat (around £450). Other areas, including the roof and rear bulkhead can also be soundproofed. And the air conditioning can be brought up-to-date witha more modern compressor (around £500).