cost to upgrade

OVERVIEW Hello, first time posting here, although I have been lurking for some time! This thread is to show people a real-world cost of doing a budget single turbo build. In the end, it ended up costing less than I expected. In the cost analysis, I will include my complete cost, including...

This topic has probably been beaten into the ground, but since I can't find any recent conversation on it...... I'm currently saving for upgraded turbo's for my 335i. The problem, aside from deciding on whether I should go single or upgraded twins is cost. I'm pretty sold on going twins at...