[Matt Monson]

George used to own and manufacture European Racing Headers. Really nice pieces that he made for PCA and old IMSA guys for a couple decades. We used to be willing to wait a couple months to get a set made.

He passed on a few years back and the fiberglass and carbon body parts guys at GT Racing in Colorado Springs bought all the jigs and rights to the company from his family.

You say they don't look like they could flow and make power but he was actually one of the few people back then who understood the idea of a tuned exhaust. For many years you would see this rubbish about how backpressure is the enemy and that you need to get rid of it. George understood that the headers were a component in the overall idea than an engine is an air pump. One needs backpressure for low end torque. And "low end" isnt' the same on all engine. Biggest isn't always the best from a performance standpoint.

He used to make specific sizes with maximum limits on engine displacement. No, you wouldn't want to put a set with his 1 5/8" pipes on a 3.6. But put a set of those on a little 2.0 or 2.2l R or 906 spec engine? Yeah. They made some more power. If buying them used today, or selling them, you need to know which ones they are. A set of those 1 5/8" would be perfectly fine for a 3.0SC engine on carbs and a mild cam. But a race engine that revs to 8000 of the same displacement? You might get choked a bit on the top end.