I've been annoying MAC for awhile now and someone there just told me that they will be avalible by the end of this month to june 15th at the latest. The tubes are 1/8 inch wider than the jba headers so I think there may be a slight preformance advantage.

Let us know if you get them and how they turn out.

Ive got those, gt mufflers, true dual exhaust and a MMR intake with tube all on the way. I'm not sure how to go about a tune. I'll let everyone know how it drives and try to post a sound clip