Not so fast. G100UL can be approved for all piston engine aircraft. There is not a blanket approval.

You still have to go here (https://stc.g100ul.com/aircraft/) and buy paperwork that makes your individual airframe and engine legal. What the FAA approved was for GAMI to sell that paperwork for all piston aircraft.

for a whole $250? that's a drop in the bucket for anything GA related.

I wonder what the Venn diagram of single-engine plane owners and people who don't like being told what to do looks like.

[I am seriously curious; on the one hand, owning and flying a small plane is an expensive, privileged hobby which tends towards the lower-upper-class demographic, but it also requires complying with a shit-ton of government regulation and direction already.]

I'm in the car hobby and considering how many people just think stuff like noise regulation and air quality measures is just nonsense solely on the basis of "I do what I want, bitch", I'm not hopeful.

Ever live somewhere without emissions testing? Welding straight pipes in place of cats becomes a point of pride.

That doesn't seem to be the norm here and we're pretty lax on emissions testing requirements. It was a bigger issue in California when I was in the car scene there than anywhere else i've lived. And their emissions are stricter than most places (if not all) in the US.

Probably also helps that the materials in catalytic converters can be pretty valuable on the scrap market.

It's fantastic! I can get ethanol free gas too!