I opted for the Borla/GM Performance sytem. Could not pass it up for that close out price (approx $400.) It sounds and looks great. Has a slight drone around 2,000 rpm, but not bad.
Also installed an Air Doc CAI the same week. The 'ol butt dyno indicated the CAI did the most good.

 

I love my Magnaflow .

 

Hey Guys,

I decided to hit up my local Muffler Shop. We installed a Magnaflow at the Resonator - removing the Resonator then duel 2.5 inch pipes out the back. Stock OEM muffler removed. I wanted 3 inch pipes but was advised did not have any and that 2.5 inch was fine. Upon start up it sounded better and deeper with hardly any drone/resonance. But after cruising around town the last 3 days I am hearing some drone. I am already hearing sensitive due to an industrial job in my 20s working with construction so my hearing is already damaged. Not sure what to do. If the drone continues I will go back to the shop an request a Magnaflow muffler where the old muffler was. I will post up pics when time allows.

Thanks a lot everyone!

 

Is there anything out there that would make the I5 sound good? I've heard flowmasters on 4.3 v6 and they sounded lame. But I love their sound on a v8. How do you make an I5 sound tough? And 1000 for cat back exhaust? Not I stalled even? Wow. that expensive.

 

I love the Gibson extreme cat-back, and I paid $700 for it plus a K&N intake

 

My H3 is Alpha so I can't advise you about the smaller engine H3 but good luck.

 

Thank god you finally did something to your HUMMER! It's now been over 2 years that you have been asking about drone.
GOSH, I hope your new exhaust does not have any DRONE! I read somewhere online that "Hearing Doctors all the time advise stay away from drone omitted vehicles" .

10-03-2012, 08:08 AM
11-29-2012,
11-30-2012



10-16-2014, 01:06 PM

 

I have the MagnaFlaow CAT back for my 07, sounds great, when you nail it, she roars. In spring, it will have been through 8 winters worth of road salt and still has no issues.

I will add, the install took me less than 30 minutes and only one beer. I cut the OEM system in half behind the resonator with a sawzall, sprayed the rubber hangars with silicone, pried off the old out of the rubber hangers, popped the new one on and bolted it up, too easy DIY project to pay somebody to do it. Back in 07, I paid $430 shipped to my door.

 

First off Hello Hummer Enthusiast.
Kicking an old dog topic! Exhaust Drone! I recently replaced my 07 H3 exhaust. I had the Magflow on it for several years and just delt with the drone! I really liked the Magflow sound off roading and cruising around town. On the highway, wow, it was horrible. I changed it to the Corsa Performance. Huge difference! However, I could still hear, much less, a slight drone. Then I found something which raises a question! The vent hole in the rear door, behind the spare tire, could it be part of the problem. I removed inside door access panel and lined my door with floor floor mat insulation. I also covered the 6"x6" vent with the same insulation, this still allows the cabin pressure to release when closing the doors. Took it for a test ride and WOW! Silence! Anyone out there still experiencing the loud drone at cruising willing to give this a go before replacing your exhaust? I would be real interested in knowing if this would have fixed the drone from the Magflow! My theory is the exhaust noise is resonating in the rear door and the door is amplifying the sound, bouncing inside the door like a speaker. I am really tempted to put the Magflow back on just to see if that was it. May be a spring project!

 

I had the GM perf on my Alpha, never had an issue with drone and it sounded better as time went on. I have had plenty of cat back exhaust systems and i have done what Ray did at local shops. The cat back always sounded better, but on the other hand after of messing with trucks and cars, stock isn't all that bad.