I searched and have read TONS about true duals and collected exhaust, etc, but i was just wondering if anyone out there with true duals has passed emissions with it or if its even possible...

if you do have true duals and pass emissions, what is your set up exactly and how much did it cost? thx for the help if anyone can answer these questions for me

 

I'm pretty sure the answer to this is an emphatic no, especially in states with a visual. Even under sniffer only, I still think no.

 

i dunno, if you have true duals with a cat and airpump for each pipe, i dont see why it couldnt happen. I think it would even pass visual. You prolly could split the air coming from one airpump and route it into both.

 

hmm yah it sounds like it'd be too much work to be worth it

 

I would say more to another state.

The only way to do this is to get catalitic converters that fit in the space of the pre-silencers and are skinny enough to not mess with each other since they would be about .25" from each other as the pre-silencers are. Honestly why bother passing emmissions all gains from the massive flow increase would be thrown away by a two catalitic converters.

 

the point of passing emissions is that i HAVE to in my area, otherwise i cant have my car registered....im still trying to figure out the best exhaust system to make that still passes emissions

 

High flow cat to RB cat-back. done don't waste the time trying to make true duals legal they will not be worth it with restriction put in there it will be like stock with extra pipes only with mandrel bends. My adviced to all people that have emmissions is to call up their congressman or congresswoman and start raising hell about the emmissions. If they care about votes and enough people call up they will listen.

 

.....It is possible to pass emissions with true duals. However each pipe would have to contain cats like the similar to oem ones. If you someone how aquired these, you could easily make them bolt on for emissions, then disapear after-words..............

Oh, just for future reference, even though I'm sure it'll be of little use to you. The fitting of the cats poses little problem. Simpley stagger where they line up and the clearance issue is solved.

 

What's this "emissions" you all speak of?!?

<-- Montana

 

There was someone on the FC3S.org mailing list that made his own true dual system with cats, and managed to pass emissions quite easily. I believe he used high flow CATCO cats.

 

You'd be laughed at. Emissions regulations will never be relaxed. They will only continue to get tougher.

 

Perhaps you didn't know that The state of florida repealed emmissions laws?

 

He could bolt in the cats, then drop them and bolt in race pipes after he passes. And on the fitment issue, you wouldnt have to put them side by side. I forget what car i saw it on, but the cats on the dual exhaust were staggered, so they were touching end to end. One would be closer to the engine, then the second one would follow afterwards. I dont know if this would be possible on a 7 tho. And it might affect the flow from each rotor.

 

The pre-silencers are ont exactly next to each other but they are pretty much going to touch if they are any larger its hard to get a ratchet or wrench into the middle bolt to take them off.

 

Did they count ALL of the votes?

 

 

hahaha. niiiice.

 

Wasn't that just for testing? You're still required by federal law to have an unmodified and fully operation emission control system. So you can still get in trouble for not having cats. That'll never change.

The easiest way to get cats into a dual system would be to have the whole thing custom made. It'd probably end up a lot cheaper than buying an off-the-shelf system and then chopping it all up to fit the cats.

 

I dunno if you could fit something like this in place of the stock cat...

 

Thats very possible if you can find the right cats to fit in there or make your own system

 

just do this till it passes

 

hmm, you really think that with enough votes a place like chicago is gonna relax its emissions laws...gimme a break. For some of us we have to bite the bullet and do it right. .

But onto the subject. I am sure you can pass given you can fit cats on each and have a properly working emissions system.

 

True duals are for cars with V-type motors like V8's and V6s we dont have true duals because it comes out from one exhaust manifold not two.... just my .02 cents

 

THey are two pipes never collected. The fact that we have only one bank is besides the point.

 

Please don't post if you really don't know what you're talking about. 13B's have two exhaust ports. Aftermarket headers have two pipes. See where this is heading? Why would we even be having this discussion if there weren't two pipes?