Should I get a top-mount or front-mount intercooler for my WRX?

Top-mount, unless you are going past the stock turbo or you spend real time on track. That covers the large majority of VB owners. The tradeoff is straightforward physics. A top-mount sits directly above the engine with a very short path from turbo to throttle body. Short piping means less pressure drop and a quicker throttle response. The cost is location: it lives in the hottest part of the car, so it heat soaks in traffic and during repeated hard pulls. A front-mount sits in the bumper with direct airflow, so it cools far better and resists heat soak. The cost is a much longer charge path, which adds a little lag and softens throttle response, plus a more involved install that often means cutting or modifying bumper structure and relocating components. Here is the part most comparisons miss: on a stock-turbo VB the question is rarely top-mount versus front-mount. It is stock top-mount versus a better top-mount. The factory unit is the weak link, and a quality aftermarket top-mount at roughly $610 to $900 solves the heat soak complaint most owners actually have. A front-mount at $760 to $1,750 plus piping is solving a problem the stock turbo cannot generate enough heat to create. So the decision rule is about your turbo, not your ambition. Running the factory turbo, even at Stage 2 on ethanol around 300whp? A good top-mount is the correct part, and the short charge path suits how the stock turbo makes its power - the VB's best trait is its fat midrange response, and a front-mount gives some of that away. Running an upgraded turbo aiming at 400whp, or doing repeated hot laps? The heat load is genuinely beyond what a top-mount can shed, and a front-mount becomes necessary rather than optional. Two practical notes. First, whichever you choose, an intercooler is not a peak power mod. It does not raise your dyno number much. It keeps the third and fourth pull as strong as the first, which is what you actually feel on a back road or a track session. Second, neither requires a tune on its own - both sit downstream of the mass airflow sensor and change nothing the ECU measures. If you are undecided and running a stock turbo, buy the top-mount. It is cheaper, it installs in an afternoon, it preserves the response the car is good at, and it is genuinely sufficient for every power level the factory turbo can reach.