OK guys, I've decided to upgrade my intercoolers as well. Let me know which intercooler you choose. Please tell me why you prefer that intercooler.

 

The Stillen ones are supposedly the largest available for the Z. I am still waiting for mine to come in. When I get them installed I will let you know how they do. They had a group buy and I got free air ducts with them. They should fit well with your GTZ front.