Key features of the W427

Published: 20 June 2008
Key features of the W427

Pictured: HSV.

• $150,000

Volume and Distribution
• HSV will build, to order, up to 427 W427s.
• Each Australian and New Zealand dealer (around 64 in total) will be entitled to one HSV W427 in the first production batch, provided they have a firm retail order.
• Further 2008 allocations will be prioritised to dealerships according to 2007 sales figures.

• All new Front Fascia exclusive to W427
• All new 3 piece rear spoiler in carbon fibre
• All new 20 inch wheel

• HSV E series performance seats in full red hot trim with W427 logo
• HSV steering wheel, gear shifter and console lid in full red hot leather trim
• HSV specific trim panels

• 7.0 Litre, LS7 Engine with HSV specific calibration
        • 375kW @ 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 baffles for high G loading.
• Front mount, 13 row engine oil cooler
• Ceramic coated, high flow 4 into 1 extractors
• High flow catalytic converters and exhaust system (3” into 2 ¾”)
• Active bi-modal rear mufflers
• Exhaust back pressure management
• Improved noise quality
• High strength limited slip differential
• New high strength 6 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 to suit new springs, ride height and bushing

• 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

Testing and development
• GMPT requirement for race track testing
• Full ‘Normal Durability’ cycle
• Hundreds of hours of engine dyne testing
• Full static and dynamic rig testing of critical components

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