How do I add HP to my WRX?

An aftermarket exhaust will allow the exhaust gases to move more freely throughout the system. This increase in flow allows your turbocharger to spool up faster and spin faster. This result is increased horsepower, torque, and throttle response for a more powerful and enjoyable driving experience.

Can you offroad in a WRX?

nope. The WRX (in its original OEM form) sits too low . . . as mentioned there are other options better suited to off road riding.

How much HP can a stock ej255 handle?

300 whp: The EJ20/EJ25 engines can handle 300 whp maximum with stock internals with no further modifications other than a proper fuel management tune. 400 whp: We suggest a set of forged AMR pistons and billet rods to safely boost up the engine.

How much HP can a stock EJ257 handle?

They will hold up to 400 whp (again as shown in our PPIHC car), but if you want to push up to or beyond that power level, a set of aftermarket H-Beam rods would be recommended.

Is it possible to get 400whp in a car?

Many many times people have come into the Newbie forum and made the statement “My goal is 400whp” and they almost always JUST got the car. It needs to be said, and anyone wanting 400whp needs to understand that 400whp is a LOT of power, and it takes a LOT to get there, and even more to do it reliably. What will get you there?

How many crank hp does a 400cc motor have?

Thats a lot of TQing around that the motor will be doing. The stock mounts were designed to hold a 300chp/300ctq motor still and keep noise at a reasonable level. If you are putting 400 to the WHEELS you are easily at 475 crank hp. Over 50% past what the stock mounts were made to handle. Then lets look at the reliability limit of the stock motor.

How much psi does it take to hit 400whp?

Custom tune obviously, and to hit 400whp you will likely need 24+PSI. If you run alcohol injection you will get there easier and safer at a little lower boost. This setup will not reach 400whp on all dynos, but it will get you there on most. Or, and this would MUCH more easily hit 400whp, and on many more dynos.