How to Upgrade an Audi TT


1. Boost the engine by swapping the engine. Swapping the engine for a higher-end engine is the hardest option because of the cramped confines of the engine bay as well as the general level of complexity of the act itself. Because of the size constraints, the only practical options is to swap in an TTRS five-cylinder (the base TT has a four-cylinder) engine; however, that car is not sold in the US. Sourcing an engine from Europe is beyond the ability of most individuals and auto shops, and can easily cost half as much as the entire TT did after shipping.
2. Boost the engine by flashing the engine control unit (ECU). ECU flashing as the most viable option, as it just involves plugging a module into the diagnostic port, whereupon it upgrades the software running the engine for a boost of 25 percent to the horsepower and torque. This can range from $200 to $800 depending upon the brand. In addition, the flash can be reversed with most brands to bring it back to factory default levels of performance.
3. Install race-spec suspension; coil-overs and roll bars can dramatically enhance the handling of the TT. Coil-overs are hydraulic shocks with coil springs wrapped around for enhanced return rates; roll bars are additional reinforcements to the car's chassis to reduce the flex in hard turns. All the parts from the TTS and TTRS can be swapped in as well as parts from third-party vendors. Buying used roll bars is fine as they have no moving parts, but care should be taken buying used shocks as they can be worn down through heavy use or damage.
4. Install racing seats. Recaro is the most popular brand but because of the high-end trim levels for this car, you can also swap in the seats from the TTS and TTRS. Racing seats are not just for looks; they allow for the attachment of a five-point harness that is mandated by some racing leagues and keeps you in your seat during high-speed turns. Recaros and other third-party brands tend to be great options and cheaper than getting an Audi seat. Used seats are a viable option as they are hard-wearing and most models have no moving parts.