Originally Posted by Chuck33079

Absolutely. A boost and afr gauge are crucial to make sure your car is running right. And you might not make the power you're paying for without a boost controller.

And waiting to do the radiator just means you'll pay a good chunk of the labor twice. They have to take off most of the front end to install the kit, so the radiator is an easy add. Once everything is buttoned up, it's not so easy.