Magnaflow Race Mufflers or Flowmaster 10 Series
06-24-2009, 08:20 PM
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Magnaflow Race Mufflers or Flowmaster 10 Series
Okay, I have a 1999 Classic (old body style) 5.7 Vortec and I'm wanting to change my exhaust up a little bit. I have Flowmaster Super 40 right now dual in/dual out and I'm considering going with two mufflers, either the Magnaflow Race Mufflers or the Flowmaster 10 Series Race Mufflers. I want it to be loud and sound powerful, but not sound like a farm truck. I know Magnaflow has two versions of theirs a 6x6 round case and a 5x8 oval case. I'm not sure which would be best but i think they are a straight through design. The Flowmaster 10 Series are a one chamber and the case is 6x3 I think. Also I'm currently running 2.50" inlet and outlet and they make all of these in 2.50" in/out and 3" in/out and the Magnaflow even has a 4" in/out, which might be a bit much. I have shorty headers and when i do my swap I'll probably put on two Magnaflow high flow converters. Which way should I go? By the way I've searched but couldn't find much on the Magnaflow Race Series. Thanks
06-24-2009, 09:12 PM
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i had a flow master single chamber, which is same as 10 series i think, and it sounded pretty good. i had stock manifolds and y pipe, and a new piece of 3 inch from the flange back, and just a turn down after the muffler. it was quiet at idle, and had that great chambered grumble at part throttle, and at wot it would just flat out scream. but i switched out to a 22 inch long cased magnaflow because of the drone, i just kinda got tired of the same booming pitch all the time, couldn't hear the radio or carry on a conversation with a passenger. the magnaflow is set up the same way with just a turn down after it and is much quieter, barely louder than stock at idle, noticeable grumble on acceleration, and a deep growl at wot. i have heard the shorter ones, and they get much louder, and i don't know, but i don't think height and width of the magnaflows really change the sound too much, just the length. its up to you really.
06-24-2009, 10:06 PM
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i have a dynomax bullet rt after my cat, it was way too raspy, so i put on a flowmaster 3" 10 series single chamber, and it mellowed the raspyness down, and sound good!!
06-26-2009, 12:00 AM
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i had a flow master single chamber, which is same as 10 series i think, and it sounded pretty good. i had stock manifolds and y pipe, and a new piece of 3 inch from the flange back, and just a turn down after the muffler. it was quiet at idle, and had that great chambered grumble at part throttle, and at wot it would just flat out scream. but i switched out to a 22 inch long cased magnaflow because of the drone, i just kinda got tired of the same booming pitch all the time, couldn't hear the radio or carry on a conversation with a passenger. the magnaflow is set up the same way with just a turn down after it and is much quieter, barely louder than stock at idle, noticeable grumble on acceleration, and a deep growl at wot. i have heard the shorter ones, and they get much louder, and i don't know, but i don't think height and width of the magnaflows really change the sound too much, just the length. its up to you really.
06-26-2009, 01:16 PM
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I've really been wanting to change my exhaust to a magnaflow race series muffler. 3" in/out--5x8 oval 6" body and either dump it, run side exit before the tire with some corsa tips or run hidden duals over the axle on either side. I know I will do that when I get a set of LT's.
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06-28-2009, 12:51 AM
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How do you have yours ran after the mufflers, do you have it on the 5.7? I'm really thinking about going through with one of these. My dual in/out Super 40 has like 40,000 miles on it and I don't think its bad, but when I open it up my brother says it sounds like its empty, sort of like a tin can sound. I don't know what to think about it, but I wouldn't mind it being a little bit louder!