Jerry Jardine is the owner of Pinnacle Performance. He is an old hotrodder from SoCal who manufactured performance headers and exhaust systems for many years. His name was well known among hotrodders. He sold his company named "Jardine Headers" years ago and moved to a small town in Wyoming. It may have been his birthplace, I don't know.
If anyone is unable to find the company numbers you might try looking for a number listing under his name, Jerry Jardine.
He may have retired or even died unexpectedly, he would be in his 70s, I think.
I had known his name since I was a kid and met him on the Hot Rod (magazine) Power Tour in 1998.
I happened to pull into the same Motel 6that he did in Council Bluffs, IA one winter night a couple years ago when I was transporting. He was pulling a gooseneck tandem axle trailer with a Dodge-Cummins dually and headed home to WY with a load of raw material, IIRC. A good guy.