1. Only considering the Flow 40 series, what is the difference in sound when dumping a single outlet and a dual outlet right after the muffler?

2. If i dumped my exhaust would i still pass the emissions test?

Thanks

 

I have a si/do and form what i've heard dumping gives you a little more rumble or raspiness....if thats a word. You'll pass emissions. Exhaust sounds great too.

 

anyone know if i will pass the smog test in CA with a dumped exhaust?

 

I had a single outlet on my last truck and I now have a dual outlet on this truck and the difference is night and day. My truck is so loud now.. I think most states require the tailpipe extend a certain number of inches from the muffler but I don't think you'll have any trouble.

 

sweet dude. thanks for the response. i'm pretty sure i'm gonna do it. i just gotta get a few bucks saved up for it haha

 

yes you will pass CA emissions with a dump. Keep in mind that the turndown needs to at least be the same hight off the ground as your rear axle so the exhaust heat and fumes don't mess up your hoses or rubber parts on the axle. I had a magnaflow and flowmaster single out dumped on my truck. Sounded pretty good but not as badass as my straight pipe system (see link in my sig). The problem with my setup I I might have to install a muffler back on there to pass emissions. I have to get smoged before the end of next month so I will know by then.

 

thanks for the info dan.. i just listened to your sound clip and i really like the sound but i'd rather just keep the muffler so i don't have to put it back on later for a smog test, ya know? your setup sounds way good tho.. makes me jealous haha.
when you say that you mean it should be any closer to the truck than my rear axle, correct? the way i interpret it is that, if anything, it should be lower than the axle.. am i right?

 

I don't have a pic of it so I'll try to explain it a little better. the end of the turndown pipe needs to at least the the same height off the ground as your axle is. The idea is help make sure the flow of hot gas coming from your exhaust pipe is more likely to travel under your axle as it passes out the back of your truck. put it this way. if you just had a short pipe coming straight off the end of the muffler you run the chance of damaging any rubber peices or hoses that are above the axle. Let me know if that explination helps.

Dan

 

yeah.. i understand it better now. thanks for the clarification. so if i were to just replace the muffler and dump the exhaust with turn down tips i should be good right? i mean in the location it is at now (not moving the muffler at all)

 

well if you have a good muffler shop do the install they should already know how to make the turndown the correct length. If you are doing it then just kinda go along with what I said. beleive me, it's not a HUGE deal to get the turndown length to where I said it should be especailly if you have a lifted truck. But doing it the way I suggested will keep you from running into problems in the future. Short and simple you remember that you don't want direct exhaust onto anything rubber.

 

cool cool.. thanks a ton Dan. i'm not planning on doing it myself because i don't have the skills or the tools haha. any suggestions on shops to take it to? especially since your local, any shops you've used personally? do they usually supply the turn downs?

 

i know a shop here in LA that will do it for 20 bucks (including dumped tip) if you have the exhaust already.

 

well considering SD is about an hour away from where I live I wouldn't call it local. There are soooo many shops in socal that I would suggest looking in the phone book for a muffler place that isn't a national chain and says "custom exhaust" in the ad. I would spend some time checkin out a few local shops to you and see what prices they quote you and who you feel comfortable with. You shouldn't pay more than $180 for the muffler and turndown installed. anymore than that isn't worth it in my opinion. I've come off the street to different shops I've never been to before and got about that price.

but if you must know I usually went to Orange County Muffler in costa mesa. The last time I went in there was the first time I had a straight pipe installed and some retard that I'd never seen there before made it look like CRAP. I got my current pipe from a shop in Westminster and they were awesome. It's been so long I can't remember what the name was and exactly where it was.

Dan

 

i appreciate it Larson but that's a bit far haha.. i'd spend more in gas getting there then i would paying for the installation ha.

and yeah.. i hear ya Dan. you aren't THAT local i suppose haha. thanks for the advice tho.

do you just add the muffler to the stock exhaust or do you have to have an aftermarket exhaust as well? i mean, i'm sure you could dump a stock exhaust with a flowmaster thrown on there but will it sound decent? i ask cause mine is stock. that statement just kinda threw me for a loop haha

 

all they are going to do is cut your old muffler off just before the inlet to the muffler and then weld the flowmaster in it's place. from there you can dump it like you want or an other number of tailpipe arrangments like out the back of the truck or out infront of the rear tire. This will all make alot more sense when they have your truck up on the lift and start working on it

Dan

 

alright.. well that's exactly what i thought it was gonna be but when he said that i started to second guess myself. thanks again for the clarification haha

 

word up to your mother =)