Well, since readymix took the liberty of writing such a nice horsepower step by step write up, thought i'd do one for the suspension. How can i make my car handle better? Well, i'm glad you asked that little billy! why are you calling me little billy? Shut up. i'm the one talking here. if i say your name is billy, it's billy. Well, theres a lot that you can do to make your car handle much better, and here's my list of things to do in what order to make the most effective handling car for the fewest bux. 1) Alignment. Your alignment is the most important thing to maximizing your current handling capabilities. You might think that right off the bat, your car is aligned properly. oh how wrong you are. subaru has a very wide gap of whats considered acceptable alignment specs, and that range is oriented to minimize tire wear, not optimal handling. The best thing you can do with your stock setup, is to have your front wheels set to the most negative camber they can yeild evenly. typically, on a stock WRX, this is 1-1.5* negative. it's not enough to wear out your tires alot faster, but it will be noticeable in turn in and grip. Subaru's have a strong tendency to understeer, so increasing front grip will yeild a comparitively looser rear end. for daily drivers or inexperienced drivers, i suggest setting the toe at all four wheels to zero. this will make a car that tracks very nicely down the freeway and minimize tire wear. if your gutsy, try feeding in some toe out. that will yeild a much looser rear end. the rear camber is not adjustable, but if you do get some camber bolts, i would suggest keeping it at around -.7-1.0. too much rear camber will yeild excessive rear grip, and bring that understeer issue up again. 2) Tires Tires tires TIRES! DON'T CHEAP OUT HERE! tires are the MOST IMPORTANT thing when it comes to your car's handling. everything you do with the car from accelerating and braking to turning all depends on the small contact area where your tire meets the ground. you can only make this area so much bigger, so you wanna make sure that said area is full of the stickiest thing you can get. also, make sure your getting the correct size. if you purchase a tire that is noticeably taller than the stock size, your acceleration will be noticeably slower, but on the other hand, if you go to small, your gas mileage will go down, because the engine will have to maintain higher RPMs at the same speeds. Good summer tires are not that expensive when you see what kind of benefits they yield. the primary choice for performance oriented drivers are the Falken RT-615s, The Hankook RS2 z212s, the Kumoh Ecsta MX, the Yokohama ADVAN AD-07s, and the Bridgestone RE-01Rs. the Falkens and the Hankooks are the cheapest, and pretty much the best option for most people. and you don't need to get new wheels to get the benefits of better tires, adding a set of these tires to your stock wheels will not only cost less than new, bigger wheels and their tires, but will also yield a similar level of grip. 3) Sway Bars Swaybars are designed to handle body roll, and maximize tire contact with the ground through a turn. their relatively cheap, and rather easy to install. there's just a few things to keep in mind when choosing your sway bar. Bigger isn't always better. getting a swaybar too large for your current spring/strut setup can cause unwanted wheel lift during cornering, and cause unwanted snap oversteer. a condition that's hard to control, hard to correct, and dangerous should it happen on the street 20-22mm solid bars apear to be the sweet spot for a stock dampened/springed or lightly modified wrx. going larger can be benificial depending on the situation, such as when you begin using a heavy spring rate or very stiff coil over setup, but that's up to you to decide. In combination with upgrading your sway bars, you should upgrade your end links at the same time. Subaru decided to cheap out on the WRX endlinks, and use PLASTIC pecies. these can break under hard cornering with the stock bar, so it's pretty much enevitible failure. upgraded endlinks start at around $75-100 and go from there for added features such as speherical bushings, and preload adjustability. in older subarus (pre 04) it's also not a bad idea to upgrade the swaybar mount. these also have been known to fail under extreme use with aftermarket bars. Don't just upgrade the Rear! the front is important too! by increasing roll stiffness in the front, you increase the tire grip at the chosen camber level, and thus can increase your smooth, controlable oversteer. the best kind of oversteer! 4) Struts Work in progress guys.... i'll keep working on this later.