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-   -   Dual Exhaust (https://www.truckforums.com/forum/chevy-silverado-gmc-sierra-forum-11/dual-exhaust-3543/)

chevyrules 06-25-2007 04:52 PM

Dual Exhaust
 
Where should i have the dual tailpipes come out?

smoke20 06-25-2007 05:29 PM

RE: Dual Exhaust
 
Straight back. Classic look, but still my favorite.

chevy112488 06-25-2007 05:55 PM

RE: Dual Exhaust
 
slightly down and behind the rear wheels, or a little more towards the corner of the bumper... but im partial...

chevyrules 06-25-2007 07:34 PM

RE: Dual Exhaust
 
I like both yer ideas... If i was to pick one, probably straight back.....

big red 06-25-2007 08:11 PM

RE: Dual Exhaust
 
Straight back is the way to go

78chev2bnice 06-25-2007 08:29 PM

RE: Dual Exhaust
 
Has any one just changed the muffler with a performance muffler(Magnaflow or Gibson)? Im asking because the stock exhaust looks like its a decent size and personally I think that getting bigger might be an overkill. (Thats just my two cents) Anyway I like out turned out behind the wheels with a niceset ofdecent sized tips. U should get a pic when u get it done.

smoke20 06-25-2007 08:46 PM

RE: Dual Exhaust
 
Yes too big is overkill. You will lose too much low end torque. I know as I did it and then had to put on reducers to get the power back. I would change it from the muffler back.

stopspazinout 06-26-2007 05:51 PM

RE: Dual Exhaust
 
cheaper that way. but i lucked out and when i bought mine it already had true duals on it.

smoke20 06-26-2007 06:41 PM

RE: Dual Exhaust
 
The older 5.7 can handle the true dual, but the 5.3 needs a tighter exhaust.

MrLM7 06-26-2007 07:32 PM

RE: Dual Exhaust
 

ORIGINAL: smoke20

The older 5.7 can handle the true dual, but the 5.3 needs a tighter exhaust.
Unless you always have your foot in it.

smoke20 06-26-2007 08:18 PM

RE: Dual Exhaust
 
And keep it above 3000 RPM all the time even off the line, so no more towing.

stopspazinout 06-26-2007 09:45 PM

RE: Dual Exhaust
 
yea thats true but im finally having the exhaust finished tomorrow.

chevyrules 06-27-2007 06:26 PM

RE: Dual Exhaust
 
Hey smoke, i happened to read your last reply and not quite sure what you were referencing to when you said now spazinout has to keep the rpm's above 3,000 and no more towing. I plan on going to a catback system eventually, am i missing something? I'll still be able to tow right? Sorry for having something go right over my head............. Jim

MrLM7 06-27-2007 06:31 PM

RE: Dual Exhaust
 

ORIGINAL: chevyrules

Hey smoke, i happened to read your last reply and not quite sure what you were referencing to when you said now spazinout has to keep the rpm's above 3,000 and no more towing. I plan on going to a catback system eventually, am i missing something? I'll still be able to tow right? Sorry for having something go right over my head............. Jim
He means the 5.3 loses some low-end power without enough backpressure. If you get the engine above 3,000 RPM, it will come alive... On the other hand, if horsepower is something you are looking for and you don't do a lot of really heavytowing, the bigger the exhaust, the better...

smoke20 06-27-2007 06:43 PM

RE: Dual Exhaust
 
chevyrules - MrLM7 is right, if you open it up too much like I did then you loose alot of low end torque. But I was able to put some reducers on and get it back. It really depends on the motor yo uhave. I recommend if you have the 5.7, true dual , x-pipe 2.5 " pipe. If you have the 5.3, leave in your Y-pipe, then use a single in dual out muffler if you want duals. With the reducers my truck tows much better now. I still plan on getting the adjustable exhaust valves if the supercharger doesn't work out.

stopspazinout 06-27-2007 09:47 PM

RE: Dual Exhaust
 
thats about how my setup is, minus the x pipe. header, 2.5 inch pipe just had some high flow cats put in so it would pass inspection. to 2 flow 40s.

chevy1224 06-28-2007 10:41 AM

RE: Dual Exhaust
 
where do you get those reducers smoke?

smoke20 06-28-2007 07:19 PM

RE: Dual Exhaust
 
They are just standard reducers from an autoparts store. I have 2 on each side right now that take it from 2.5" down to 1 3/4". It helped alot. I tried reducing it to 1 1/4", but lost some milage andtop end power, so I am going to take the new reducers off and go to 1 1/2".

chevy1224 06-29-2007 01:22 AM

RE: Dual Exhaust
 
ok thanks

sootjunkie65 06-29-2007 09:49 AM

RE: Dual Exhaust
 
I partial to having it behind the wheels angled down, but thats just me.
Its definitly worth swapping the muffler if the tubing is already big enough 'cuz the stock mufflers are designed to be quiet so therefore there is restriction and a loss of power. Whatever you do dont go too big, I had a Dakota with the 3.9 V6 and I put dual 2 1/2's on it, it sounded awesome but at the low end ( below 2,500 rpm) i lost a good amount of power, plus the cops didnt like it too much...

tgalyean 06-29-2007 01:20 PM

RE: Dual Exhaust
 
Straight out the back is always a crowd pleaser. A truck's ass is like a woman's ass. When put together right, nothin' looks finer.

MrLM7 06-30-2007 06:34 PM

RE: Dual Exhaust
 
Except more of them...


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