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Subaru Impreza WRX STi performance parts

Michael Berenis' photo
Tampa Sports Car Examiner

By making the right performance parts, you can expect to generate anywhere from 400-1000 hp out of a Subaru Impreza WRX STi. Daily drivers have a common horse power goal of around 400. Only the most fierce, drag racing Subaru Impreza WRX STi will try to attain 600+ hp. In some extreme engineering cases, upwards of 1000 hp can be attained. That is a lot of power for such a light weight vehicle.

For a complete list of Subaru Impreza WRX performance parts and vendors, click here.

The ultimate in Subaru lifestyle is tested in off road and track applications. However, Subaru did not manufacture them to take off road abuse above certain levels. They can take a lot of abuse stock, but will eventually start to break and wear down. To reduce replacement time, you should invest in off road quality performance parts. Skid plates, upgraded suspension, downforce, auxiliary lighting, and more are all common performance part upgrades.

Additionally, suspension components that are stock will need to be tightened for less wheel travel to increase control of the vehicle. There is a certain method to the suspension modifications that will increase performance that will not lower ride height but increase rigidity while reducing wheel travel. Learn more about Subaru Off Road performance at the link above.

Some owners like to use larger turbo chargers to modify their Subaru Impreza WRX STi. This forced induction modification is a great way to gain lots of power. Depending on the size of turbo you choose, several supporting modifications will be required. Luckily, the Subaru Impreza is a rally inspired vehicle. Out of the box, it's pretty fast to begin with. A fully modified Subaru Impreza WRX STi can beat a Lamborghini Gallardo in the quarter mile, and launch! Go Subaru!

Common Subaru Impreza WRX STi modifications:

Over all, Subaru makes a bullet proof motor. I have seen some crazy things done to a Subaru engine and it still runs. Ingenuity gets creative when it comes to squeezing out the last drop of power. If you want to use a turbo, make sure you upgrade for appropriate fueling. Running your car lean can do damage to the engine. It is rare a Subaru engine blows, but it does happen.

Appropriate fuel system upgrades consist of fuel injectors, fuel rails, fuel pressure regulators, fuel filters, and high pressure fuel pumps. Upgrading fuel lines and adding a fuel pressure gauge to the system will help you prevent engine fires. When upgrading your car, it is wise to take every step possible to prevent fire from occurring.

The Subaru Impreza WRX STi is an extremely light weight vehicle in it's stock form; a great candidate for weight reduction. By removing extra stock components you don't need a couple hundred pounds can be removed resulting in better handling, performance, acceleration, and sound. Removal of sound deadening materials allow better acoustics inside the cabin.

Taking out the air conditioning system can remove rotating mass and reduce weight at the same time. Typically an aftermarket pulley system can be used to delete the air conditioning system out of the drive belt.

Top 5 Subaru Impreza WRX STi performance websites:

The performance Subaru Impreza WRX STi is the most common modified vehicle on the road today. There are many of aftermarket performance parts that you can buy for your car. All years of Subaru Impreza WRX STi have an extensive selection of parts which make them great cars to modify. A decent amount of sound and power can be gained by modifying your Subaru Impreza WRX STi.

Subaru Impreza WRX STi Off Road

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, Tampa Sports Car Examiner

Full-time engineer turned writer, Michael brings knowledgeable articles about Tampa Bay's sports car scene. His experience in import, domestic, and exotic manufacturers ensures quality content for all readers. Michael is also a contributor at CarDomain.com and can be contacted via Streetfire.net...

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