Shopping for mufflers online to replace my aging one, and hoping to find something lighter, thinner, and not noisy, I came across this one:
Negative Supercharging Emission Vapouriser Muffler - Impulse Engine Technologies Pty Ltd - Australia
Perhaps it belongs in the unicorn corral, perhaps not, I don't know. Look at their emissions data. Given the recent discussion about CATs and cooling during EOC, this seems interesting. But I will not be getting one... it would not fit my car, I bet its costly, and well... I'm skeptical of the site's claims for FE and for some of the emissions benefits. What do you think?