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Performance Exhaust SystemsDetailed discussions regarding performance headers, single, dual, street and off-hard racing exhaust systems for your vehicle.
This is a discussion thread titled "Magnaflow Exhaust", within the Performance Exhaust Systems forum, part of the Technical & Vehicle Assistance Forums category.
My truck stock setup was duals into the muffer with single out. I just added a dual in/out Magnaflow out the sides. I like the sound but the resonance on the highway is a bit much. I don't think my truck has a resonator on it. Are there any solutions to quiet down the resonance some? thanks for any help.
Adding a resonator, or in your case two, is a way to help with resonance. Also you could replace the tips on the end of the tailpipes with resonated tips.
As strange as it may sound, and I can't speak from personal experience on this, I read on another forum that a few guys cut off 12" or so from the end of there tailpipes, and in there words greatly reduced the drone.
I Would NEVER Cut My Pipes Because Of The Possable Chance Of Getting Fumes In The Cab---Think About IF Your Truck Is Down Some Where And Temp. Is 10 Degrees And You Have To Run The Engine To Keep Warm---You Never Know If The Bad Fumes Are Getting There Untill Some One Finds You DEAD---I Came Very Close Years Ago On a Hunting Trip Had A Lantern In Cab For Heat At Night, All At Once It Went Dim---That Made Me Think About What Was Happening Opened A Window And It Went Brite--I Am Not That DUMB Any More ! ! I Always (Now) Open (2) Windows And A Roof Vent In The Trailer To Be Sure I Have Fresh Air---I Do Not Trust The Furnace At All !
My magnaflow single out had a very bad drone when i first put it on, but after a while is got noticably quieter. I would leave it for a lil while before spending more money
Thanks for the info guys, turns out the magnaflow is a 18" and may put a 22" on. I think more than anything whats bothering me is the noise from the outside exhaust. Do you think 22" would sound quieter or what about a 50 or 70 series flowmaster?
As far as actual size the Magnaflow 18" is about equal to the Flowmaster 50suv and the 22" is equal to the 70 series. Magnaflow mufflers are a straight thru internal design and the flowmasters are a chambered design.
A guy at a muffler shop didnt think the 70 series would be any quieter than my 18" magnaflow because flowmasters are chambered vs. straight thru. anyone agree with that? He suggested two resonators instead of buying a new exhaust.
Generally speaking, the longer the muffler case, the softer the sound. Also if your tips exit before the rear wheel, you will get more in cab noise/resonance/drone.
I second the resonated tips suggestion.
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07 Tundra DC TRD 4.7, THE Blue Streak
Top Gun Customz levelling kit
Tinted Winder, mostly shaved emblems
Kobalt toolbox, Silverstar bulbs
Removed charcoal filter,
pillar vinyl and gayass pinstripes
Coming attractions: Tires and stereo upgrades
On true dual exhaust(two mufflers and two tail pipes) a H or X pipe between the in pipes will cut down drone but it will take away the deep pounding V8 sound. There are 2 or 3 chambers in a stock muffler to stop drone. a resonator after the mufflers will help reduce drone. there already is one in the passenger side pipe. good luck.
On true dual exhaust(two mufflers and two tail pipes) a H or X pipe between the in pipes will cut down drone but it will take away the deep pounding V8 sound. There are 2 or 3 chambers in a stock muffler to stop drone. a resonator after the mufflers will help reduce drone. there already is one in the passenger side pipe. good luck.
SO all a H or X pipe do is cut down the drone? I was planing on getting Magnaflows with the x pipe they sell...dual outs behind the rear wheels, similar to the TRDs. Is this a good idea?
Some folks have added an 18" glasspack upstream of and in addition to the muffler to act as a resonator and been pleased with the results.
A 22" magnaflow will be just about as quiet as stock except under WOT.
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I'm not a pilot, but I did stay in a Holiday Inn Express last night!
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Magnaflow Exhaust
Linear Mode
