Magnaflow Muffler

**kychevyman** · 11-23-2009, 03:24 PM

I'm looking at a magnaflow muffler for my 07 NNBS Chevrolet Silverado. How will only a new muffler compare to a complete catback system? Also could someone help me with what muffler I would need to get? I don't want my truck to be obnoxiously loud in the cab. I just want to be able to hear it when I get on it. Also, when I'm cruising at about 70 I don't want it to be really loud either... So any suggestion on which one to get?

**NEUMANNZZ** · 11-23-2009, 03:30 PM

I have the 3 inch single in/out 18" length case. slight drone on the highway at 70. goes away at 75mph. I would look at getting a 22 inch case length muffler.

**kychevyman** · 11-24-2009, 03:54 PM

anyone else have any suggestions?

**HP_freak** · 11-28-2009, 01:10 PM

i have been lookin in to magnaflows my self. i like their straight threw design units. from my experience, you will always have a louder internal noise in the cab of the vehicle. and at some engine speed, there will be some drone. that being said, i would go with a single in/dual out or dual in dual out unit. im not to experienced with how long the case is. i hope this helps

**jshirev** · 11-28-2009, 06:02 PM

I have seen several people switch from flowmasters to magnaflow because magna flow dont hammer your ears on the highway. I've been looking at the magna flow #12599 22" case, 3" Dial in/out with the tru-X design for my 98 Z71.I plan on dumping it out the side in front of the wheel.

**jshirev** · 11-28-2009, 06:04 PM

Oh yeah, Just by replacing the muffler will pretty much only help the sound. Replacing the whole system from the cat back will prolly sound even better and add horsepower/ torque and gas mileage if you can resist your right foot resting on the pedal too hard...

**carolinaZ** · 11-30-2009, 09:03 AM

The stock pipes are pretty much like the catback system pipes. Why spend 400 when you can spend 100?

**jshirev** · 12-02-2009, 07:12 PM

on my OBS they are wimpy lil skinny pipes from the manifold back. They look nothing like some beefy Magnaflow catback system. I was under a NNBS yesterday looking at it's factory setup and it has way better piping than mine from the factory. plus they sound good but quiet.

**Moto_X_Eric** · 12-03-2009, 07:06 AM

Originally Posted by NEUMANNZZ

I have the 3 inch single in/out 18" length case. slight drone on the highway at 70. goes away at 75mph. I would look at getting a 22 inch case length muffler.

Hey NEUMANNZZ, what would be the reasoning with going from the 18" case to the 22" case?? would it make it quieter?

**narizon** · 12-03-2009, 10:47 AM

I have a single 3" in/out 24' Magnaflow case that's to quiet at idle.Sounds great under load & does drone at high speed (70-75 mph).It used to be much louder but after headers,y-pipe,Mag converter & new 3" pipes it calmed it down a little to much for me.Will be changing it soon.

**NEUMANNZZ** · 12-03-2009, 11:06 AM

Originally Posted by Moto_X_Eric

Hey NEUMANNZZ, what would be the reasoning with going from the 18" case to the 22" case?? would it make it quieter?

to get rid of the annoying drone. I would assume it would be just a little quieter overall.

**kychevyman** · 12-03-2009, 03:30 PM

Thanks for all the help and suggestions... Unfortunately my dad has decided that he doesn't want me to do anything to the exhaust yet, so I guess I'm going to have to work on him a bit and persuade him to allow me to do it.