Motorsports | Subaru Global

			Season Overview - The Car
			Production Car World Rally Championship Information

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Main improvements on the Impreza 2005 model (WRX STi spec C)

(In comparison with 2004 Group N Homologated Car >A/N5656<:)

-	Weight reduction of 70kg achieved by using light glass, a thinner roof plate and aluminium boot lid
-	Strengthening of hubs (Front/Rear), including adopting P.C.D.114.3
-	Improved high caster angle front suspension. Introduction of aluminum rear lateral link
-	Turbocharger with ball bearings which enhance engine response
-	Rear crossbar which improves body rigidity
-	Large water tank for intercooler water spray, ensuring stable and sustained engine performance
-	Air cooled engine oil cooler
-	Yaw rate control newly introduced enabling drivers to control centre differential

Specifications of Impreza Group N 2005 Model vs 2004 Model
(In comparison with base car)

	2005 MY(FIA A/N5676)		2004 MY (FIA A/N5656)
TYPE	GDBE4FH-UM		GDBD4EH-GL
Overall length	4415mm		4415mm
Overall width	1740mm		1740mm
Overall height	1425mm		1425mm
Wheelbase	2540mm		2525mm
Front track	1490mm		1490mm
Rear track	1495mm		1485mm
Ground clearance	140mm		140mm
Weight	1370kg		1440kg
Max.output	206kW(280PS)/6400rpm		206kW(280PS)/6400rpm
Max.torque	412N.m(42.0kg.m)/4400rpm		394N.m(40.2kg.m)/4400rpm
Turbocharger	Ball Bearing		Plain Bearing
Gearbox	6 speed and reverse		6 speed and reverse
Final ratio	3.900		3.900
Steering	Rack and pinion 13 : 1		Rack and pinion 13 : 1
Suspension	Front :	Macpherson strut & coil springs	Front :	Macpherson strut & coil springs
	Rear :	Macpherson strut & coil springs	Rear :	Macpherson strut & coil springs
Minimum turning circle	5.7m		5.4m
Brakes	Front :	Brembo 17 inch discs	Front :	Brembo 17 inch discs
	Rear :	Brembo 17 inch discs	Rear :	Brembo 17 inch discs
Wheels	17 X 8.0JJ		17 X 7.5JJ
Tyres	235 / 45R17		225 / 45ZR17
Differential	Front :	Helical	Front :	Sure Trac
	Center :	DCCD	Center :	DCCD
	Rear :	Mechanical	Rear :	Mechanical
Roof ventilator	Equipped		None

The homologated Impreza WRX STi spec C is outlined as follows:
Base Car for the homologation

IMPREZA WRX STi spec C WR-Limited (released in May 2004, SUBARU GDB)
* Aluminium 17 inch wheels.

-	FIA Group A Homologation number (base certification) A5676 and homologation extension VP, VO
-	FIA Group N Homologation number N5676 and homologation extension VP, VO

Homologation Forms for the FIA Group A and N homologation will be available from the JAF (Japan Automobile Federation) or other ASNs (National Sporting Authority). Homologation information concerning manufacturing of Group N car including VO is scheduled to be announced on the STI Internet site at: (www.subaru-sti.co.jp) as required. * VP : Variante de Production/Production Variant
* VO : Variante option/Option Variant