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05-27-2010, 02:08 AM #1
Newer model 5.3's with magnaflow?
I had an 04 and put a single magnaflow muffler to dual tips and it sounded amazing. Low tones and not too obnoxious. I'm thinking about going the same route with my 2010 5.3. My buddy, a GM mechanic, works at the dealership I bought the truck from. So I got the keys and went to say hello. I started telling him my plans for the truck. As I'm mentioning the magnaflow plans another mechanic walks over and asks if my truck has(forgive my stupidity, I'm not sure of the correct terms for this) the technology where the engine shuts down to 4 cyl on the highway to conserve fuel. I say yes and he says don't buy an exhaust cause it's gonna sound like total crap on the highway.
Can anyone attest to this or have any opinion at all on this subject?
05-27-2010, 07:36 AM #2
Unless you buy Corsa or Borla or have the AFM/DOD disabled by a tune, you'll have to deal with that "tractor" sound when the engine shifts over to 4-cylinder operation in high gear.The Cheap-*ss Modder & Thread Killer
The Realist says, "The glass is too big".
2007 Chevy Tahoe LS
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05-27-2010, 01:49 PM #3
I know it's a matter of opinion but is it loud when it's in the 4 cyl mode? Does it really sound like crap?
05-27-2010, 03:02 PM #4
________2013 4C Rated__________
05-28-2010, 10:38 AM #5
Has anyone on here disabled the DOD by tuning? If so any idea what it would cost?
I talked to my buddy at the exhaust place and he said the same thing about it sounding like crap. He said his boss has a tahoe with the DOD and he got someone to tune it and it sounds better but he got a freebie tune from a friend. He also said he gets BETTER mpg after disabling it.
05-28-2010, 10:57 AM #6
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you can disable the DOD with a diablosport predator. thats what i have and how i did it. it cost me around 280$.CHEVY TIL I DIE.
2009 Silverado Z71 LT/5.3/Flowmaster 40 Series/Volant/Diablosport
2006 Trailblazer 4X4 LS
2001 GMC SIERRA 4x4 - Totaled
99 Chevy Silverado 2x4 traded in
06-07-2010, 11:45 AM #7
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I have an 07 with the 5.3 and I did a Magnaflow exhaust. It sounded decent while operating at full power but when DoD kicked in it sounded like a helicopter to me. I then compounded the problem by getting Dynatech long-tube headers. Sounds burly under heavy throttle and I love it, not so much when DoD kicks in. I don't intend to change my exhaust any time soon but I am contemplating getting a tune to do away with the DoD.
Adam - Wherever the Navy puts me
2007 Chevy Silverado Regular Cab
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Comp Cams 54-450-11
Dynatech Full Length headers
Dynatech Intermediate pipe with hi-flow cats
2.5" Single-in, Dual-out Magnaflow muffler
306 ft-lb torque
06-07-2010, 12:32 PM #8
I have magnaflow on mine, it makes a lower droning noise when its decellerating in 4 banger mode...but other than that it sounds great. this is going to be an issue with just about any aftermarket exhaust because they aren't tuned for the 4 cyl exhaust note. its really not that annoying and doesnt sound really bad, just different. for me the sound of the engine at WOT sounds really mean..like a nascar almost but at idle its not loud at all.ROTARYENGINEPETE
'07 GMC SIERRA SLT | Z71 | 4X4 | 5.3L FF
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Z-PACK 3-4 CLUTCH
REBUILT WARN XFER CASE
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06-07-2010, 05:14 PM #9
Alright thanks guys, good info here. I'm going to do the magnaflows any day now. If it's that annoying to me I'll just get the tuner.
06-22-2010, 06:13 AM #10
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