Damn, your car is really clean and nice looking. Do those come with Xenon's? If not, pick up a set. They make a huge difference on the road and you don't to worry about them burning out on you ever year like the cheap Xenon bulbs.

 

*Audi/Volkswagen 1.8T (All models)
Many engine software upgrade options are available and produce on average 35 to 40 peak hp with torque gains of 70 to 80 lb-ft. Some are just engine software upgrades while others offer hand-held tuning devices to switch between stock and modified. Some companies allow the user to select multi-octane programs for increased performance when using higher octane gasoline. Check out APR, GIAC, Neuspeed and Revo Technik. $399-$499*Audi A4 1.8T (B5, 1997-2001)
A K04 turbo upgrade can produce 225 to 245 hp, depending on octane and if additional modifications are installed. These kits normally consist of the K04 turbo, 5.0 bar fuel pressure regulator, spark plugs and gaskets. Sources include AWE Tuning and Neuspeed. From $1,699If larger horsepower numbers are required, ATP Turbo offers a direct bolt-on Garrett turbocharger. The kit has the capacity to produce 250 to 350 hp, depending on additional modifications. $1,299-$3,999*Audi A4 1.8T (B6, 2002-05)
Adding a properly designed front-mount intercooler is always beneficial when increasing boost, if low octane fuel is used, or if you live in an area that experiences extremely hot ambient temperatures. Gains up to 20 hp have been reported. Check out APR and AWE Tuning. $999-$1,049Another option for reducing intake temperatures can come from an OEM source. In Europe, Audi equips the A4 with a dual intercooler setup from the factory. Since these parts are designed as original equipment, the fit is perfect on US models with zero modifications needed for installation. Another great bonus: for cars with an aftermarket front bumper cover, no modification is necessary when installing the dual intercooler kit. Along with reduced intake temperatures, gains of up to 20 hp can be realized. Contact Greedspeed. $899The K04-15 turbo upgrade has been a popular upgrade for the 1.8T engine since its debut in 1997, and it holds true for the second generation (B6). The Neuspeed K04 kit comes complete with turbocharger, TT-sourced injectors, spark plugs and gaskets necessary for the upgrade. This is intended to produce peak power in the 240 to 270 hp range, depending on additional modifications. $1999For the truly power-hungry, APR has a Stage III upgrade kit that includes a Garrett Ballistic Series turbocharger, custom Inconel exhaust manifold, a larger MAF sensor and injectors and a high-flow catalyst. With the addition of a cat-back exhaust and a front-mount intercooler (sold separately) the kit produces a claimed total 340 hp and 332 lb-ft of torque. $5,299