As much as I can't stand any Chicago Politician including BHO, the EPA Lawyers who interpret the Laws Congress passes based a mix of Some Sound Facts and way too much Fraudulent Junk Science is the problem. Replacing the EPA with a Professional Organization of Environmental Engineers would sort out the Wheat from the Chaff and regulations would be not perfect, but more sensible. Those who cook up Junk Science used to bring on costly laws or regulations should be subject to both Criminal Charges and Civil Liability. Her is an example of the EPA generating JUNK SCIENCE to keep their funding flowing:
http://junkscience.com/2012/10/31/new-d ... n-request/ With the DPF Kits being yanked from the market,the Engineers who know how to design a High Performance DPF will come up with one that works with out killing power. The Bean Counters are the ones who are forcing the Engineers design DPFs that are too small to cut costs. I do agree that a DPF is stupid, but having an Aftermarket High Performance DPF available will be a good seller. When I talked to Ron Wolverton (in 2010) of Suncoast about a High Performance DPF, he felt there was a market and his customers would shell out the money.
Take a look at the upcoming EPA Regulations, gassers will get particulate filters too (2014?).
When it comes to Diesel EGR, the soot, heat and oil vapor from the CCV are the problem that clogs up the intake and trashes out the engine oil. Urea known as DEF is a better solution than EGR, but it costs money to use.
Again, gassers are going to get it too.
Perhaps with the Particulate Filters getting rammed down the throats of Gasser fans, the High Performance DPFs and GPFs may be on the market in the near future.