These WRX internal engine problems put a damper into performance potential. Rod and piston failures also usually take the whole engine out with them, requiring a new engine. Piston failure is also common along with connecting rod failure. With respect to horsepower levels, the rods commonly fail within the 320-350whp range. of torque is when connecting rod failure becomes a concern. Too much low-end torque tends to be the cause of connecting rod failure on the WRX. One big downside of the WRX is that the FA20DIT has weak connecting rods. Looking for suspension mods? Checkout our WRX Coilover Upgrade Guide.īefore we dive into the best mods, we need to discuss power limits. This guide will cover the 6 best WRX mods and show you how these simple bolt-on upgrades can add up to 100whp of power gains. of torque in the base models.įortunately, the WRX and the FA20DIT engine can easily produce 300+whp with a few simple bolt-on modifications.

The STI and its EJ257 engine produce 300-310hp and 290-300lb-ft. The STI is powered by the larger EJ257 engine, a 2.5L turbocharged flat-four with sequential multiport fuel injection. However, the WRX is often overshadowed by its bigger brother, the WRX STI. of torque, the small engine outputs a decent amount of power for its size. The FA20F, also commonly referred to as the FA20DIT, is a direct injected 2.0L flat-four twin-scroll turbo engine.

2015-2021 Subaru WRX cars under the VA chassis code are equipped with the FA20F engine.

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