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Holden Special Vehicles unveil seven litre Supercar the W427

February 29th, 2008

Holden Special Vehicles today unveiled a seven litre program at the Melbourne
Motor Show, the last instalment of the company s 20th anniversary celebrations.

The car to be known in its final development stages as the W427 is finished in the
same “Panorama Silver” paint scheme as the original Group A SS VL Commodore,
released at the Melbourne Motor Show of 1988, exactly 20 years ago.

HSV Managing Director, Scott Grant, said the W427 was a tribute to how far the
company has come in just twenty years.

“To be able to produce a vehicle of these proportions is truly remarkable”, Scott
Grant said.

“The W427 will be quite possibly the fastest road registrable ‘Supercar’ ever
produced in Australia and among the quickest anywhere around the world”, he said.

While power output figures are still to be confirmed, the W427 is likely to produce in
excess of 370kW of power and 640NM of torque.

“It will also be one of the safest cars HSV has ever put on the road”, Scott Grant said.

“A new six piston front braking system will provide a 50% increase in pad area, while
the W427 also receives a revised ESP calibration, six air bags, improved handling
and new Magnetic Ride Control settings.”

The W427 receives a bimodal active exhaust system to improve noise quality and
back pressure management.

Styling and design highlights include an all new front fascia, a three piece carbon
fibre rear spoiler, 20 inch machined faced alloy wheel, unique exhaust tips and red
leather interior.

Scott Grant said HSV would be introducing a unique customer relations program to
accompany the launch of the new vehicle.

“The W427 will only be produced in limited numbers and we want to reflect that
exclusivity in how we connect with our Supercar customers”, Scott Grant said.

“This program will see the LS7 engine being fitted at Clayton, along with the dry
sump system and a range of other engineering features. We are looking at
opportunities to allow owners to visit HSV and view the unique manufacturing
process that goes into building this car.”

The W427 will go into production in the middle of the year and will be available for
sale in dealerships in the third quarter of 2008.

“Make no mistake, while the specifications of the car unveiled on the stand today at
the Motorshow may change slightly between now and when production begins, this
car is destined to make as big an impact as the original Walkinshaw twenty years

W427 key highlights*
All new Front Fascia exclusive to W427
All new three piece rear spoiler in carbon fibre
All new 20 inch wheel
HSV performance seats in full red hot trim with W427 logo, steering wheel,
gear shifter and console lid in full red hot leather

  • 7.0 Litre, LS7 Engine with HSV specific calibration
    • 370kW @ 6500 rpm
    • 640Nm @ 5000 rpm
  • Over radiator style cold air induction system with high flow air filter
  • Dry sump lubrication system with 2 stage pump
  • Hand fabricated aluminium oil reservoir, with internal baffles for high G loading
  • Front mount, 13 row engine oil cooler
  • Ceramic coated, high flow four into one extractors
  • High flow catalytic converters and exhaust system (3 into 2 ¾ )
  • Active bi-modal rear mufflers for exhaust back pressure management to improve noise quality
  • High strength limited slip differential
  • New high strength six speed manual gear box (TR6060)
  • GMPT LS7 Clutch with new actuator and pedal assembly for high clamp loads


  • New springs, 30% stiffer than GTS
  • Revised ride height 20mm lower than GTS
  • New stiffer rear suspension bushing
  • All new MRC calibration


  • New 6 piston front braking system (50% increase in pad area)
  • Strap drive, 2 piece floating front rotors (380 x 35mm compared to 365 x 32mm one piece on GTS)
  • High friction pad material

* Specifications of W427 as at Melbourne Motor Show

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