1 in 2 out Mufflers

[Lo Life]

I'm getting ready to put an exhaust on my 2002 Silverado. I am putting a 1 in 2 out muffler on. I'm just curious as to what people with this set up have, 3" in and 2-1/4" or 2-1/2" out. Would there be any noticible difference between the 2, or is it just preference? I know that 1 in 1 out apparantly has the best performance gains, but i'm mainly going for looks/sound. I'm either going to put a flomaster 40 series delta flow or a magna flow on it. Thanks in advance...

[bigred305]

They are good setups, but if you run two 1 in 1 out mufflers(true duals) you will get better sound and maybe a little more top end power. But the setup works good and I from personal experience would recomend the Flowmaster 40, but others on here like the Magnaflow mufflers..

[JB]

Originally posted by 2002ssSilverado
I'm getting ready to put an exhaust on my 2002 Silverado. I am putting a 1 in 2 out muffler on. I'm just curious as to what people with this set up have, 3" in and 2-1/4" or 2-1/2" out. Would there be any noticible difference between the 2, or is it just preference? I know that 1 in 1 out apparantly has the best performance gains, but i'm mainly going for looks/sound. I'm either going to put a flomaster 40 series delta flow or a magna flow on it. Thanks in advance...

I just had the Magnaflow single 3" inlet and 2-1/4" dual outlets muffler installed on mine and I love it. I would recommend this muffler over flowmaster, its stainless steel and has a lifetime warranty. Also, you don't get any in cab resonance or drone especially at 75mpgh. However under accleration or WOT it sounds badass. I have had 40 and 50 series flows but I like this one the best.
The ticket said $144.95, and my total drive out was $251.76 installed as you see it.
The part number is: 3.00"/2.25" Dual 14278
http://www.magnaflow.com/03cat-back/03ss/gifs/5x8sd18.jpg

Here is a couple pics of my setup.

http://a2.cpimg.com/image/12/A5/8250642-dd19-028001E0-.jpg

http://a0.cpimg.com/image/10/A5/8250640-d007-028001E0-.jpg

http://a8.cpimg.com/image/0E/A5/8250638-e7a0-028001E0-.jpg

http://a7.cpimg.com/image/0D/A5/8250637-50e7-028001E0-.jpg

[Jokeman]

Jeez John, everytime I look at those pictures it makes me wish I had done mine out the side.:bawl: :bawl:

[Lo Life]

who installed your muffler Y2KZ71? it looks great. Thanks for the replies.

[JB]

Originally posted by 2002ssSilverado
who installed your muffler Y2KZ71? it looks great. Thanks for the replies.

The place is called southwest mufflers on HWY6 near clay road (bearcreek golf course area). I just now noticed that you were in Houston :o

What part of town do you live/work??

[Joe]

Originally posted by Y2KZ71


http://a8.cpimg.com/image/0E/A5/8250638-e7a0-028001E0-.jpg


Nice work on the exhaust!!

[POORBOYZ]

Post some pics afterward so we can see.

[BigKID]

I have the single 3" in / dual 2.5" out magnaflow on mine and I like it alot. I will changing it all up soon though. Going with two single 2.5" magnaflows with a x-pipe.

[JB]

Originally posted by gmcjoe


Nice work on the exhaust!!

Thanks gmcjoe, its different, and not for everyone, so I appreciate the good comment.

[Durden]

If you are going to go for looks/sound and want to stick with a 1 in 2 out, I would say run a 3" in and 2 1/2" outlet, you will get a little more sound out of a 2 1/2 than if you went smaller. As for Flowmaster or Magnaflow, both are good... I think you get a little more sound out of Flow's but more power out of a Magnaflow. I am going to be getting a 3" in, dual 2 1/2" out Magna put on Friday. Since your truck is a little newer (and has dual cats, unlike mine), I would actually run the Magna dual in/dual out with a built in X.

[Lo Life]

thanks durden, that 2 in 2 out does seem like a good idea. i looked on their web sight and really didn't know what i was looking for. i would like to get in in Stainless if they have it. i guess i'll have to ask a muffler shop about that. Unless any of you know exactly which i would need, part #...... Thanks

[Durden]

No problem. They do offer a couple 2 inlet/outlet mufflers in stainless. The part number that would be a little louder is #14468. Another that is stainless too, just has a little bigger body (not AS loud) is the #14568. Magnaflow stainless (http://www.magnaflow.com/03cat-back/03ss/03stainlesssteel.htm)

[redtwin]

Here I was thinking I was the only one with a side exit in front of the rear wheel:( . I used a Flowmaster 70 series (heeeuge muffler) with 3" inlet and two 2.5" outlets. I did the work myself and it went to gether surprisingly easier with basic handtools. The only thing I had to farm out was the 90o bends in the exit pipes coming out of the muffler, but that only cost me $30 including the cost of the pipe and bending it. The guy threw in a bunch of clamps too.

I do need to get new tips though as I cheaped out and got tips from Discount Auto Parts and they rusted on the inside. My total cost for that mod was $230 including a new high-flow cat, the muffler, exit tail pipes and cheapo tips.

Take care

[Lo Life]

So the only difference in the bigger sized mufflers is the sound. Is one recomended over the other? I mean for certain Applications? ( 18" vs. 24" ) which would be better overall for my truck? Thanks again.....

[Durden]

Between the two mufflers I listed in my earlier post, basically the only difference would be how much sound they dampened. Smaller=Louder, dont get me wrong, the bigger magnaflow will still roar when you step on it, just have a little less sound at highway speeds/idle. Its pretty much up to you on which to get.

[97GmcZ]

Will I lose any performance in the lower rpms if I go with the Magnaflow 2.5" dual inlet/dual outlet for a stock 97' 350

I dont want to lose any off the line power.
Thanks
:fsg: