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300whp in a well balanced, 3,200 pound, front-wheel drive hatchback is underrated. Don't get me wrong, 400 is better if you're....me, or anyone else like me. But 300whp is nothing to shake a stick at. That's good enough to take down many other $40k-50k range performance cars while paying a fraction of the price and being able to comfortably take 3 or 4 kids to school (not while you're taking down the other car, of course). With the Focus ST, it's relatively easy to get there.

You simply cannot plan your WRX build the same way you could up through model years 2014 for the WRX and 2021 for the STI. The car is fundamentally different than previous generations. The FA20DIT powered WRX is a massive overhaul from what Subaru owners and enthusiasts were used to prior to it's 2015 model year release. On paper, it seems similar - turbocharged, boxer engine, all-wheel-drive, sedan. After that it gets blurry. Aside from a new body design, the engine is now direct injected and features a completely different turbo configuration with a twin scroll unit sitting right underneath the front of the engine with very short header runners leading to the turbine housing. This is a huge contrast to the port fuel injected, single scroll turbo located above and behind the engine with past EJ series engines.

If you've found yourself itching to modify your Ford Focus ST, there is tons of information out there on the subject and you may have learned plenty already. If you don't know already, the Focus ST responds very well to mods. But generally speaking, it only responds well to mods if you can tune for them. This is because the Focus ST’s ECU can learn and adjust to compensate for increased air flow. So if you are about to step out on the road to modifying your Focus ST, here are a few suggestions to help you get the most out of it.

There are a lot of people that buy a performance car with the immediate intention of modifying it and having fun. However some people are more concerned with maintaining the complete factory warranty and are therefore more cautious when it comes to modifying their car. There is nothing wrong with either approach and it really just comes down to personal preference. But for those of you who want to modify your car without running into any warranty issues, you should keep reading.

When we say "best", we're throwing cost out the window. Inevitably, many of the best mods usually cost more money. So this isn't about how much something costs, this is all about smiles per gallon and pure driving satisfaction. Welcome to the best mods list. Buckle up.