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I would bet just replacing this with a catted down pipe might be worth like 30HP, I might even throw a turbo on or a supercharger, don't know if that will ever happen, but I want to keep it in mind.
I assume that the 2011 si civic just had one cat. They check for cat but maybe not the second one I hope! You would have to know that however.
How are you going to read the stamp upside down
https://www.maine.gov/dep/air/mobile/catconverter.html
Looks like ME follows the CARB law. I don't know who inspects your car but do the physically look for the stamp on the cat because it is impossible to see it with the eye?

My srt-4 cat has been sitting on the oily Bench for years-I do have a cat delete too, but its too much trouble to take it on and off and the High flow cat helps with noise and stinky stuff. I vot for trump the only person who hates CA more then I do
I keep my srt-4 just to piss off democrats. I make civic uncivilized LOL! Where's the super charger?That sucks for you guy's. You could always swap back the factory stuff but year after year I could only imagine the pain it would be.This is pretty much what has me on the fence about doing any intake or exhaust mods. I'm just not keen on doing a bunch of work and then failing inspection.![]()
How do I get Rob Rainer phone number? I spoke to Derrick Robinson on phone and emailed him so I could figure out how to use this hondata device. So I took the first step- Derrick said to tune after a few mods, but I would like to see a stock tune so I know how to use it on some real mods. Looks like exhaust is the best place to start. After seeing what garbage they put on the Honda si , Why two cats that doesn't make much sense too me. I don't live in Ca and have been running a High flow cat on the SRT-4 and it pass's the inspection here, they don't look for carb cats-just one High Flow cat will pass here.Derrick Robinson:
http://www.innovative-motorworks.com/
His work:
https://m.facebook.com/profile.php?id=108670155827677&ref=content_filter
Rob Rainer:
https://m.facebook.com/profile.php?id=750215073&ref=content_filter
Both do E-tuning and are really good I have used both when VitViper went to MoTec.


program, how do I do that? This isn't like you get this stuff and it just works.