What are the best first modifications to make to a Ford Transit Custom for improved performance?

I just purchased a Ford Transit Custom and want to make some modifications to increase its performance. Are there any specific upgrades or modifications that would be recommended for this model? What are some popular modifications that other Ford Transit Custom owners have done? I'm looking for ways to enhance my driving experience and potentially increase the resale value of my van.

Congratulations on your new Ford Transit Custom! One popular modification for this model is to install a cold air intake system. This can increase horsepower and improve fuel efficiency.

Another great modification is to upgrade the exhaust system. This can improve engine performance and also give your van a more aggressive sound.