WHO did manufacture those H-O TRI-Ys??? Valley Tube Co., a job shop that made half of the small header COs headers here in SoCal. That Co. no longer exists. When Ron first decided to do this , he called and asked me what my plans were regarding the headers. I told him I had no interest in making them again and to go for it. That simple-no concerns about royalties, copyrights or anything else.My original D ports were prototyped by "Stan's Mufflers" and desiged to fit 2nd gen Firebirds. They would NOT fit GTOs. The round ports were prototyped by Jerry Jardine.I brought my GTO and 74 SD to Jerry's shop (Jerry was doing custom headers @ this time-not production factory built headers) in Santa Ana, with my requirements of ground clearence,filter clearence,ease of installation, AND 1-7/8" tubes. After a couple of trys,Jerry informed me that 1-7/8" tubes could be done on a hand built basis , but not on a "production" basis. Since I didn't want to sell $800.00 headers in a $150 header world (1988-90) I compromised on building them to 1-3/4". I think Ron may have been bitten by this limitation.
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