Anyone running a single cat after the downpipe? Does it get hot enough to be effective?

My "plan" is to run a 3.5" down pipe, into a 3.5" electric cutout. With the cutout closed the exhaust will go into a single 3.5" universal cat, then into a single 3.5" in/out muffler, and dump it out the side in front of the rear tire. I'm hoping to cut down on fumes and not draw too much attention here in CA. If I want attention then I can just open the cutout

Thoughts?

 

you will never pass emissions in CA with having modified the stock cats, even if you have cats later in the system.

 

Not trying to pass emissions.

 

I have added aftermarket cats to my exhaust before and noticed basically no difference in the sound, but it didnt smell quite so bad. Also, 3.5" and 4" cats get very expensive.

 

Magnaflow makes some, not sure how effective they are though. There are a lot of fuzz in my area. I'd hate to pull up next to a cop and have him/her get a face full of gas fumes.

MagnaFlow 59920 - MagnaFlow Universal Spun Catalytic Converters - Overview - SummitRacing.com

 

Yea I had 2 of the 3" version of that installed and it didnt change the sound at all....whenever I get pulled over I just turn off the truck. If they ask why I just say I dont want to waste gas ideling.

 

Im running catless longtubes, then i have about 12" of pipe that i plan on replacing w a cutout, then an 09+ third cat, followed by a 24" magnaflow, into two tips. Its really quiet until i really get on it hard and I can only smell the exhaust for the first 15 sec of a cold startup. I live in cali too so the quieter the better, when i want it loud ill just open up the cutout.

 

Btw, i have an extra 09+ third cat/resonator if your interested.