R Option line
september 1999, Jaguar announced a new line of performance option for
the XK line, as well as for the XJR and S-type, which included many
parts developped for the XK180 concept car :
- 20" alloy BBS wheels ( 9" front / 10" rear ) with 255/30
and 285/30 Pirelli P Zeros
- Revised suspension control unit
- Uprated torsion bars and springs, lowering the
car by 1/2"
- High performance Brembo brakes featuring four piston
2 pieces 355x32mm front disk and one piece 330x28mm
rear disk, cross drilled and ventilated
- Retuned steering system
price listed in the original press release was UKP 5900 for the complete
XKR package. The press release, including many pictures, can be
viewed in the Jag
Lovers brochure section
the spring 2000, Jaguar announced a limited edition version of the XKR,
called the Silverstone, introduced around the Grand Prix week end to
mark Jaguar's return to the track where it scored so many victories
in the 50s, 60s and 70s.
the F1 team performance was anything but impressive, the XKR Silverstone
certainly is. The drivetrain is identical to the regular XKR but
it includes all of the R options announced earlier with special badging
and interior treatment completing the package. Only 100 cars were built
and sold in the the UK with an additional 200 US spec models imported
in the US and sold in november / december 2000. Most of these special
cars where sold at or above sticker, and a few even were offered on
Torque Development International
in the UK, this tuner offers a variety of options to increase performance
of the XK8, XJR, XKR and also XJR6 engines, mostly thru exhaust and
intake work. Various stages are offered, some offering as much
as 100 extra HP, but in some case for track use only as some modification
will cause the cars to fail emission or noise tests.
those of you who wished the XKR came with a manual gearbox, TDI has
a partial solution thru a push button shifting system installed on the
the steering wheel. For just under UKP 3000, you can play Eddie Irvine
and shift like an F1 driver, regaining some of the control Jaguar gave
up by not offering a manual gearbox...
also offers some suspension upgrades ( torsion bars and springs ) to
Monthly magazine had an article on the company and test drove one of
their modified car, in the december 2000 issue.
British company, Paramount is well know for its conversions, often extensive,
through mechanical, interior and exterior trim packages.
offer various packages to improve handling and braking along with push
on the picture to see the Paramount brochure, available in the Jag Lovers
the US, Paramount is now (2003) represented by Terry's
German company has been working on Jaguar for years and offer a entire
program of upgrades and accessories, including the all out Arden XKA.
the engine, they offer different packages to raise boost and hp along
with an improved exhaust system, and push button shifting. Also available
are front and rear spoilers and other trim pieces which, while nice,
have a disctinct German look such as what you would expect on a BMW.
Their full aerodynamic package has been tested at the Ford wind tunnel
in Cologne where they achieved not only reduced drag but also a 20%
reduction on front axle lift at high speed.
most unique thing they offer is a removable hardtop for the XK8 / XKR
convertible, the only one of its kind.
the UK many of Arden products can be found thru Racing Green Cars LTD
(see below). In the US, Arden is now (2003) represented by XKs
Racing Green Cars LTD
Green Cars offers various performance upgrades along with body kits,
wheels, etc... including Arden products.
details on their exhaust system upgrades, see the pictures taken
by Tony Bailey during installation of a new system on his XKR coupe.
just outside New York City, this tuner now offers Jaguar upgrades for
the XKR, XJR and S-type including brakes, wheels, differential, underdrive
pulleys, etc... They can also reprogram the car's ECU and do interior
work on leather and wood along with body kits from Arden and Ritter.
you like horsepower you probably have heard of Henessey, based in Texas,
they're usually know as the Viper people. They now have added Jaguar
to the list of cars they work on and they have developped a performance
package adding 105 hp to the stock XKR (and XJR)... yes 475 hp !
spectacular boost is achieved through high flow / ported heads, custom
stainless exhaust and high flow cats, custom induction and ported /
available are front brakes upgrades and various wheels / tires combinations.
Interestingly, Henessey only upgrades the front brakes (Brembo 4 piston
calipers, ventilated and cross drilled rotors, performance pads and
Motul 600 fluid)
these 105 hp do not come cheap, it will cost you $ 25 000 and 10 weeks
of downtime, but with a limited 3 year / 36 000 miles warranty.
Keisler Automotive Engineering
company, based in Maryville Tenessee, is best known for various upgrades
for the older XJS line, including manual gearbox conversions.
are now starting to offer upgrades and parts for the XK line including
larger exhaust, XKR mesh grilles for the XK8 and some of the R
options ( Brembo brakes, Detroit 20" wheels ).