Flowmasters getting on my nerves... - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LockDoc** · 01-03-2016, 09:01 PM

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I had 40 knockoffs put on the '67 Panel Truck with the LS1/4l60e. The pipes are all the way back and angled out the sides. My hearing is pretty bad and the drone still drives me nuts. I am planning on driving it on some long trips so I am going to have them replaced next Spring, but I don't know what to put on it. I have been thinking about stock type mufflers with electric cutouts. I have 3 or 4 months to think about it....

LockDoc

piecesparts · 01-03-2016, 09:38 PM

I gave up running Flowmasters for a couple reasons. The first one being that I had to replace the muffler way to many times, due to the sidewalls cracking and breaking open and second, due to the sound being too much of a drone to be comfortable. I now run Magnaflow stainless steel mufflers and I get the longevity that I want and the sound is right about where I want it for daily driving. Loud when you are hard on the pedal and a rumble when you are not.

drewbert41 · 01-04-2016, 12:59 AM

What model Magnaflows are you guys running?

iostorm · 01-04-2016, 08:25 AM

I had the American Thunder system on my Challenger, it was un-drivable due to drone. I had a muffler shop install a J pipe and zero in cab drone, I regularly drove it out of state.

Done give up on it just put a J pipe in you will love it, I will dig up a photo of mine to show you. it is just a pipe which is capped at the end and the frequency bounces back and cancels itself out. There is a lot of information on the internet on selecting the correct length for the drone RPM.

iostorm · 01-04-2016, 08:28 AM

I will find a video of driving at 70 drone free.

jondancer · 01-04-2016, 08:37 AM

Is the j before or after the muffler?

iostorm · 01-04-2016, 10:51 AM

After the mufflers at the tail pipe

chevy72blu · 01-04-2016, 12:32 PM

I have dynomax super turbos piped straight out the rear and they are a bit loud behind a stock LS1. No drone and they sound awesome, but I wish I went a bit quieter. YMMV

**invicta455** · 01-07-2016, 01:59 PM

i know the feeling on flowmaster

drewbert41 · 01-07-2016, 04:25 PM

I think I am going to get some Porter Steel Pac mufflers.

01-03-2016, 09:01 PM	#51
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,629	Re: Flowmasters getting on my nerves... - I had 40 knockoffs put on the '67 Panel Truck with the LS1/4l60e. The pipes are all the way back and angled out the sides. My hearing is pretty bad and the drone still drives me nuts. I am planning on driving it on some long trips so I am going to have them replaced next Spring, but I don't know what to put on it. I have been thinking about stock type mufflers with electric cutouts. I have 3 or 4 months to think about it.... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

01-03-2016, 09:38 PM	#52
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: Flowmasters getting on my nerves... I gave up running Flowmasters for a couple reasons. The first one being that I had to replace the muffler way to many times, due to the sidewalls cracking and breaking open and second, due to the sound being too much of a drone to be comfortable. I now run Magnaflow stainless steel mufflers and I get the longevity that I want and the sound is right about where I want it for daily driving. Loud when you are hard on the pedal and a rumble when you are not. __________________ Frank

01-04-2016, 12:59 AM	#53
drewbert41 Registered User Join Date: Aug 2015 Location: Champaign, IL Posts: 491	Re: Flowmasters getting on my nerves... What model Magnaflows are you guys running?

01-04-2016, 08:25 AM	#54
iostorm Registered User Join Date: Oct 2015 Location: Grafton Ohio Posts: 94	Re: Flowmasters getting on my nerves... I had the American Thunder system on my Challenger, it was un-drivable due to drone. I had a muffler shop install a J pipe and zero in cab drone, I regularly drove it out of state. Done give up on it just put a J pipe in you will love it, I will dig up a photo of mine to show you. it is just a pipe which is capped at the end and the frequency bounces back and cancels itself out. There is a lot of information on the internet on selecting the correct length for the drone RPM. Attached Images

01-04-2016, 08:28 AM	#55
iostorm Registered User Join Date: Oct 2015 Location: Grafton Ohio Posts: 94	Re: Flowmasters getting on my nerves... I will find a video of driving at 70 drone free.

01-04-2016, 08:37 AM	#56
jondancer Registered User Join Date: Jul 2010 Location: central michigan Posts: 1,194	Re: Flowmasters getting on my nerves... Is the j before or after the muffler?

01-04-2016, 10:51 AM	#57
iostorm Registered User Join Date: Oct 2015 Location: Grafton Ohio Posts: 94	Re: Flowmasters getting on my nerves... After the mufflers at the tail pipe

01-04-2016, 12:32 PM	#58
chevy72blu Registered User Join Date: Apr 2004 Location: Las Vegas, NV Posts: 2,188	Re: Flowmasters getting on my nerves... I have dynomax super turbos piped straight out the rear and they are a bit loud behind a stock LS1. No drone and they sound awesome, but I wish I went a bit quieter. YMMV __________________ RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e

01-07-2016, 01:59 PM	#59
invicta455 Senior Member Join Date: May 2009 Location: greensboro north carolina Posts: 536	Re: Flowmasters getting on my nerves... i know the feeling on flowmaster

01-07-2016, 04:25 PM	#60
drewbert41 Registered User Join Date: Aug 2015 Location: Champaign, IL Posts: 491	Re: Flowmasters getting on my nerves... I think I am going to get some Porter Steel Pac mufflers.



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