Before I owned my Boxster, I had a modded Alfa GTV (the last of the RWD ones, not the current FWD ones). That taught me a few important lessons:
1. The best mod is an engine swap. More reliable and less stress on the engine.
2. Forced induction = asking for trouble. It's not just a matter of slapping on the kit and away you go. You will have to reprogram the fuel maps as well. Be prepared to spend a lot of time on the dyno getting it right. It may end up costing you as much as an engine swap.
3. If you want to go fast, the best mod is to learn how to drive. When I first got on the track, my time was 1:25. After just ONE lesson, I shaved 10s off my time. My engine swap only bought me an extra 1s. Tyre change got me 3s. This was in the Alfa. In my stock Boxster I can do it in 1:00.
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