Originally Posted by ALB:
I've heard John Connolly mention before (last spring?) on the Samba that exhausts from Tiger (I'm pretty sure he used Tiger's name) were back ordered in a conversation about slow service from A1, so I'm reasonably sure that's where they come from. I knew there were a couple of other places building the sidewinder design but had never heard of A1 Racing. If I hear anything to the contrary I'll let you (and everyone else here) know.
When I ordered mine from Tiger back in March/April of this year - there was a 2 week wait from the ceramic coating process. I went into the whole deal with the understanding that it would take a bit to get it.
The best way to make sure you are getting an original A1 Sidewinder is to call Tiger at his shop and order it directly from him. You can also ask if the A1 Performance header on Aircooled.net is one of his. The stickers and medallion shown on the headers look like his logo.
I called Tiger directly and explained what car I had and what motor I have. I let Tiger make the recommendation. I have a 1.5" merged header because I only run a 1600. Some guys who run the bigger motors go with the larger header size. As luck would have it, this exhaust will also work on my 1915. 
http://genuinea1.com/
Address: 721 S Main St
Phone: 714-836-7201
Hours: 8 a.m. – 5 p.m., Mon – Fri ; 8 – 11 a.m. on Saturdays
Great stuff fits directly no issues at all.
Ted