2014+ Exhaust Systems & Mufflers

sti · December 22, 2015

Got the single exit system. Part # 615628. Autoanything.com had it on sale for 30% off when I purchased it. The drone/chopper isn't all that bad. Before I would just feel it, now I hear it.

Awesome! Thanks for the info. I thought about it during the 30% off sale and didn't pull the trigger. I'm torn between this and just having a local shop put in a Magnaflow and cut out the flapper and resonator.

STI

country_09 · December 24, 2015

Just finished my LTs, ORY, and 22" magnaflow to a 5" tip and its absolutely perfect. I had an aeroturbine 3535 with the LTs at first and was horrible. Terrible drone, raspy as Fk, switched it today and I can hear myself think now!

Truckin 55 · December 24, 2015

Corsa Sport Exhaust installed last month sounds great with no problems. Tightened clamps a little with 1/4 inch ratchet Thanksgiving and again few days ago with 1/2 inch drive. As others have mentioned a little loud cold start and assume slight popping is normal while decelerating. Just hear a low rumble on HWY with trans in 6th but in 5M very noticeable. Corsa to me has more of a Glass Pack sound compared to others and makes a warble sound in V4 mode. Range made a huge difference but quit working so sent it back last week. Range Tech just sent message Module has been serviced ,updated to Series 7 should be here Saturday

Txjose · December 24, 2015

Just finished my LTs, ORY, and 22" magnaflow to a 5" tip and its absolutely perfect. I had an aeroturbine 3535 with the LTs at first and was horrible. Terrible drone, raspy as Fk, switched it today and I can hear myself think now!

Could you pretty please post a sound clip....

sti · January 6, 2016

I have talked to a couple of shops in my area and they are all $325-$400 for Magnaflow custom duals. I was questioning the difference between the 14" and 18" and one of the guys told me most people wouldn't be able to tell the difference between them. I'm assuming he is talking about in the cab? I would think there would be a pretty good difference outside or with the windows down. Anyone have first hand knowledge? It's really hard to tell from YouTube clips.

6D9 Matt · January 6, 2016

Im torn between the 14" & 18" right now too. Or even the Borla XR1. Ugh

Kerrslight · January 6, 2016

Here you go. I started with 18" and switched to 14". Cab sound is about the same. Outside the 14 is a more aggressive sound and a bit louder. Very pleased with the 14".

6D9 Matt · January 6, 2016

Thanks, I had seen your 14" vid but not the 18". Definitely think Id want the 14" out of the two.

Now to just decide between the 14" and the XR1. Was kinda waiting to see what results came out with the muffler trial in this section before making a decision.

sti · January 6, 2016

Here you go. I started with 18" and switched to 14". Cab sound is about the same. Outside the 14 is a more aggressive sound and a bit louder. Very pleased with the 14".

Both sound really good. Do you have the 5.3 or 6.2? Also, yours looks like single in/single out. Will dual out make much difference?

Tong Lu · January 8, 2016

I cut everything out after the 3rd "Cat" and replaced it with just pipes. It is slightly quieter than my 2008 Silverado with flowmaster super 40s. Kinda sad but these trucks are quiet.

I'm thinking next step is going to cut the 3rd "Cat" out, long tube and highflo cats but it might be too loud, anyone done this yet?

I was also thinking just doing the Long Tube Headers and keeping the stock cat, just have to relocate the existing cats to fit the header. I've done a lot of research and it's all over the place on how much HP gain Highflo is compared to the stock Cats.

Kerrslight · January 8, 2016

Both sound really good. Do you have the 5.3 or 6.2? Also, yours looks like single in/single out. Will dual out make much difference?

I've got the 5.3. Muffler is SI/SO and has no difference in performance or sound if you go SI/DO. I just did SO because i wanted it to run the same route as factory.

2004lebanshee · January 13, 2016

What muffler does magnaflow use on their cat backs. 22"? Safe to assume the 18" weld in set up would be louder?

Johnnylayg · January 13, 2016

Looking into adding a 40 series or 10 series flow master with turndown in my 2014 5.3 Sierra. Any advice on which might be best? I did hear there is sort of a drone when in v4.. Any advice is helpful. I do a lot of high way driving. Want to sound aggressive not overly annoying when I have my daughter

Kerrslight · January 13, 2016

What muffler does magnaflow use on their cat backs. 22"? Safe to assume the 18" weld in set up would be louder?

Not 100% sure on that, but it should say on their site. I would assume You should be able to get a full system with the muffler of your choice. I could be wrong tho.

For what it's worth, if you just buy the muffler alone and have it welded on and then run the pipes the way you want, it would be much cheaper.

tyrich88 · January 13, 2016

Has anyone compared the performance differences of doing SI/SO to DI/DO or true duals?
It would seem obvious to me that true duals would be the best bet, next to straight pipe... But I've been wrong before.
So I wanted to see if anyone has researched this.