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2004 Subaru Impreza WRX STi Specifications
Also See Our STi
Gallery From The 2003 NAIAS
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Engine | Drivetrain
| Chassis | Suspension | Brakes
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Engine |
| Engine Model |
EJ257 |
| Engine Type |
Horizontally Opposed, 4 Cylinder
Intercooled Turbo
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| Displacement |
2.5 Liters (2,457cc / 149.9 Cubic Inches) |
| Bore x Stroke |
3.92" x 3.11" (99.5mm x 79mm) |
| Firing Order |
1 - 3 - 2 - 4 |
| Compression Ratio |
8.2 : 1 |
| Valvetrain |
DOHC 4 Valves Per Cylinder
w/ Active Valve Control System (AVCS) |
| Horsepower |
300 @ 6000 rpm |
| Torque (lb. ft.) |
300 @ 4000 rpm |
| Redline |
7000 rpm |
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Drivetrain |
| Gearbox |
Longitudinally Mounted
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| Center Differential |
Limited Slip w/
Driver Controlled Center Differential (DCCD) |
| Front Differential |
Suretrac Limited Slip |
| Rear Differential |
Mechanical Limited
Slip |
| Forward Gears |
6 |
| Clutch |
Dry Single Plate Diaphragm
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| Gear Ratios |
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| 1 |
3.636 |
| 2 |
2.375 |
| 3 |
1.761 |
| 4 |
1.346 |
| 5 |
0.971 |
| 6 |
0.756 |
| Reverse |
- |
| Final Drive |
3.9 |
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Chassis |
| Overall Length |
173.8" |
| Overall Height |
56.3" |
| Overall Width |
68.5" |
| Weight, Total (MT) |
3263 lbs. |
| Weight, Front |
1893 lbs. |
| Weight, Rear |
1370 lbs. |
| Weight Distribution, F/R |
58% / 42% |
| Wheelbase |
100" |
| Tread, Front |
58.7" |
| Tread, Rear |
58.5" |
| Ground Clearance |
- |
| Steering Ratio |
15.2:1 |
| Turns Lock To Lock |
2.7 |
| Wheels |
17" x 7.5" BBS
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| Wheel Bolt Pattern |
100mm, 5 lugs
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| Tires |
225/45R17, Bridgestone
Potenza RE070
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Suspension |
| Front |
Independent,
Macpherson Inverted Strut, Coil Spring
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| Stabilizer Bar Diameter |
19mm |
| Camber |
-0º 30' |
| Caster |
4º 50' |
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| Rear |
Independent, Dual Link, Coil Spring,
Inverted Strut
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| Stabilizer Bar Diameter |
20mm |
| Camber |
-0º 40' |
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Brakes |
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Front |
Rear |
| Type |
Ventilated Disc,
4 Piston
Brembo Calipers |
Ventilated Disc,
2 Piston
Brembo Calipers |
| Disc Outer Diameter |
326mm (12.83") |
316mm (12.44") |
| Disc Effective Diameter |
268mm (10.55") |
268mm (10.55") |
| Disc Thickness |
30mm |
20mm |
| Brake Distribution |
Electronic |
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