JG Edelbrock does make TB's now. I had one on order about 4 months back but they kept delaying the delievery date for months so I told them to go to hell and I never ended up getting it. I'm pretty sure its a 65mm. I could be wrong but that sounds right. But anyways I personally wouldn't waste your money on a TB. It won't help out that much to be honest. Unless you have a lot of work done to your car where you would need to be sucking in much larger amounts of air. If you do decide to get a TB anyways just make sure you don't get one too big, because that would just hurt your power instead of give you gains.