[Excaliber]

If I'm not mistaken, correct me if I'm wrong, as to specs:

SPF runs CV joints for the rear axles, for example. CSX cars do not? Just one example of the differenct specs from SPF to SAI. Like Sears Die Hard batteries are actually made by Johnson Controls Inc. But SOME years they were/are made by a different company, still sold with the Sears brand name. The difference between a Sears battery and a Walmart battery, both made by the SAME company but sold as different brands? The specifications! One "name" carries greater weight (and price) than the other. One could make a case for Shelby specs being superior to SPF specs, or not. But it is difficult to argue the SPF NAME carries greater weight than the Shelby name, even if the cars were 100% identical (which they are not).

SPF pays a fee to be affiliated with SAI and receive it's "blessing". A fact that not all manufacturers are happy about. In fact, are ANY other manufacturers happy about it? I don't think so...