Quote:
Originally Posted by nelsonr31
NP Mike,roughly 2.5-2.75 ID. I'm not sure if theres a company that makes a true 3 inch DP for this kit, probrably has to be custom made. I actually have a Random Technology high flow cat on order, its a direct bolt on between the DP and the cat back and I believe its 2.5 inches ID. I'll find out tommorow cause thats when I'm picking it up. It already has two bungs for the oem o2 sensors all I have to is get another bung welded on for my AEM wideband. The reason im using this setup is for emissions since its pretty tight here and the cops who like to randomly check if its there. My car is fairly low but you can still tell if theres one there or not, or else I'd be goin with a custom true 3 inch test pipe. Btw I already have the skunk2 70mm, now that is one nice ass exhaust. Here's a pic of the Random Technology High flow cat. Now my question for you Mike is where do you think I should install the AEM wideband O2 sensor? Between the first bung and the cat? If anyone else has any input as to where they installed theirs this information would be great.
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The closer you get the wideband to the engine the more accurate reading you will get. Try and put it as close to where Honda put their AF sensor. This would be the optimum position as Honda would out it in the best spot for reading AFR's. If youput it too close though the heat might be too much for the sensor and mess it up. But if you put it yoo far your readings will be off. the further you put it away the leaner the mixture will read because of dilution from cleaner air. Like when a Dyno shop uses a sniffer at the tailpipe the reading is always leaner than what is actually there. As long as you put it before the catalyzer you should be OK. I would personally put it right near the stock location as close as I possibly could.
And about the Skunk2 exhaust, have you had a chance to hear it with the turbo yet? I need to know if it's going to be obnoxious because I really can't have an exhaust like that in my state because the police are brutal here. MA wants to pass a law where any exhaust mods are illegal. Basically any aftermarket exhaust part is not legal at all and I will be fined and I will NOT pass inspection. So any exhaust that is super loud will not work for me. I would love to get an exhaust that sounds like the GReddy EVO II but in 3" or even 70mm. I heard that GReddy is releasing a 70mm catback for the Si this summer. But I don't know how true that is. The GReddy EVO TT is a sweet setup but I can't find a listing for our cars for it.