3.5" single exhaust options?
Dec 22, 2018 | 12:57 PM
#1
3.5" single exhaust options?
Time to try a different exhaust on my 07 Avalanche and I'm looking for a 3.5" single system with no luck so far. Stainless Works has a 3.5" system for the Tahoe (which I'm sure I could make work) but I'm hoping there are other options out there that I haven't come across. Anything out there that I'm missing? Current mods are in my signature.
I'd also consider modifying a factory takeoff 3.5" exhaust like my Denali has but so far no luck finding one.
EDIT: decided to try searching for a Yukon XL which should be the same and found Gibson and Mangaflow options in 3.5" just not positive they will fit. Also, like the Avalanche, it looks like a part number difference starting in mid-2008 but no idea what the change was.
I'd also consider modifying a factory takeoff 3.5" exhaust like my Denali has but so far no luck finding one.
EDIT: decided to try searching for a Yukon XL which should be the same and found Gibson and Mangaflow options in 3.5" just not positive they will fit. Also, like the Avalanche, it looks like a part number difference starting in mid-2008 but no idea what the change was.
Last edited by MWRitter; Dec 22, 2018 at 01:09 PM. Reason: Add'l info
Dec 23, 2018 | 07:31 AM
#2
After some more searching I found the Magnaflow 16720 3.5" system which is for the 2007-8 Escalade ESV/EXT and Yukon XL Denali. Since the 07-8 Avalanche shares part numbers with the Suburban and Yukon XL I'd imagine this system for its 6.2L cousin should work?
Dec 23, 2018 | 07:45 PM
#4
I wonder if it sounds like total **** without the cats. Wouldn't mind ditching the magnaflow for that on my Colorado if it didn't sound like total *******.
Dec 23, 2018 | 08:58 PM
#5
I have a 6.2 OE muffler on a 3.5" back system in my Tahoe. With 1 7/8s LTs, 3" Y and the 6.2 muffler it was a little buzzy. I added a Dynomax Bullet before the tip and that helped a lot.
6.2 systems are actually 3.375 input 3.5 output on the muffler.
Im a bit disappointed as I only got ~16k out of it before it started rattling at 2500ish RPM. I am in the process of swapping it out for a 3.5" Magnaflow. P/N: 12909. No information on how this sounds yet, but it's $120, stainless, straight thru and 3.5"
I'm in a slightly different boat than the OP however because I built my system from the LTs back. I didn't buy a kit for our trucks, or splice the 6.2 muff into the original plumbing.
6.2 systems are actually 3.375 input 3.5 output on the muffler.
Im a bit disappointed as I only got ~16k out of it before it started rattling at 2500ish RPM. I am in the process of swapping it out for a 3.5" Magnaflow. P/N: 12909. No information on how this sounds yet, but it's $120, stainless, straight thru and 3.5"
I'm in a slightly different boat than the OP however because I built my system from the LTs back. I didn't buy a kit for our trucks, or splice the 6.2 muff into the original plumbing.
Dec 23, 2018 | 09:31 PM
#6
I have a 6.2 OE muffler on a 3.5" back system in my Tahoe. With 1 7/8s LTs, 3" Y and the 6.2 muffler it was a little buzzy. I added a Dynomax Bullet before the tip and that helped a lot.
6.2 systems are actually 3.375 input 3.5 output on the muffler.
Im a bit disappointed as I only got ~16k out of it before it started rattling at 2500ish RPM. I am in the process of swapping it out for a 3.5" Magnaflow. P/N: 12909. No information on how this sounds yet, but it's $120, stainless, straight thru and 3.5"
I'm in a slightly different boat than the OP however because I built my system from the LTs back. I didn't buy a kit for our trucks, or splice the 6.2 muff into the original plumbing.
6.2 systems are actually 3.375 input 3.5 output on the muffler.
Im a bit disappointed as I only got ~16k out of it before it started rattling at 2500ish RPM. I am in the process of swapping it out for a 3.5" Magnaflow. P/N: 12909. No information on how this sounds yet, but it's $120, stainless, straight thru and 3.5"
I'm in a slightly different boat than the OP however because I built my system from the LTs back. I didn't buy a kit for our trucks, or splice the 6.2 muff into the original plumbing.
Dec 23, 2018 | 09:50 PM
#7
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Dec 24, 2018 | 09:13 AM
#8
I took the cats out of the Colorado and with the stock muffler/catback it sounded less like a tin can and more like a 55 gallon drum. Worst exhaust sound ever lol. But sounds like magnaflow is still the best option. I prefer engine roar over exhaust noise anyway.
Dec 24, 2018 | 11:07 AM
#9
Teching In
Joined: Dec 2018
Posts: 2
Likes: 0
My muffler was rattling after the cam swap so i bought a 4ft piece of 3.5 inch and 3 45's from summit.
Cut off the 3rd useless cat and made my own with a borla XR-1 #40946 and the stock resonater.
Love the sound and the wife gets compliments all the time on it.
Cut off the 3rd useless cat and made my own with a borla XR-1 #40946 and the stock resonater.
Love the sound and the wife gets compliments all the time on it.
Dec 27, 2018 | 10:11 AM
#10
TECH Fanatic
Joined: Sep 2014
Posts: 1,085
Likes: 119
From: NC
Here is my old 6.2 with 1-7/8 OBX headers, no cats, 12909 muffler and the rear resonator cut off and just dumped over the axle. I had a 1 year old baby at the time and pull the boat to the lake every weekend with him knock out asleep. And never worried about a down shift waking him up. It sounded great at WOT but no drone and the tires where louder than the exhaust at cruising speeds.
