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Headers and Exhaust System Discussion related to Exhaust systems and headers.
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Old 09-18-2019, 10:30 PM   #21
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ON zz4 55 2dr ht I have hooker coated full length ( yes they are below the front of frame about 1/2").
What is the part number on your headers?
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Old 09-19-2019, 02:08 AM   #22
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I'm using Dynomax Super Turbo 14" on several of my cars, and I love the sound on all of them. I use the ST's on my '49 Olds with an LS engine with Sanderson headers. I also have Sanderson Headers on the 350 in my '55 Nomad, but the sound I enjoy the best is with the 327's in my '56 Chevy, and my '62 vette. I'm using rams horn headers on both of these. They sound great at idle but maybe a little too loud with the 'vette with the pipes coming down behind the rear tires.

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Old 09-19-2019, 02:11 PM   #23
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I've heard that Flowmasters drone at a certain RPM. Any truth to that?
ALL aftermarket performance mufflers have some amount of drone at some rpm level. If there was no drone, then they would be on factory cars or there would be no performance advantage.

The level of drone varies based on the design of the muffler, horsepower, crossover pipe used, position of the mufflers, position of the tailpipes, insulated hangers or not and more.

So it's best not to draw any conclusions about drone (or performance for that matter) on any muffler brand but rather draw the conclusions on the model of the muffler being considered.
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Old 09-19-2019, 10:55 PM   #24
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Super Comp 2458-1. I also have 500 steering box, power steering and ac and did not have to beat on any thing for clearance. Side motor mounts are the speedway version.
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Old 09-30-2019, 03:59 PM   #25
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I have FlowMaster 40s on the 283 with a radical cam and then I have a Flowmaster super 44s on zz3 both set up with long tube headers and straight pipes out the back. They both sound pretty old-school. Meaning they are loud. Super 44s are definitely a little bit lower/deeper tone. I spent hrs. Listening to video clips.......
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Old 09-30-2019, 05:53 PM   #26
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In my '56 210 I have BBK tuned shorties with Cherry Bomb Vortex mufflers, cross over and full length exhaust. But LS1 / T-56 6 speed,,,, No Drone.

My C5 Vette has Borla, drone only at low RPM on a load, like u a hill and too lazy to shift down. Otherwise excellent.
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Old 09-30-2019, 08:39 PM   #27
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Very "old school" I know but so am I, LOL. Full length 70's Appliance headers with full length true duals out to the back bumper and slight turn down there. No H or X crossover pipes. Running two original 2'' in and 2'' out Thrush mufflers from the 70's that have a nice deep rumble and really "talk" to you when you mash the go pedal. Love the sound for sure.

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Old Today, 07:20 AM   #28
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pypes 2.5" on my ls conversion. bill
A little late to the game on this one, but I am also running the Pypes 2.5 full exhaust when I did the LS swap. They were the only one I could find that had a 2.5 for a wagon. It has one hell of a drone at 2400-2600 RPM, which of course is my cruising RPM at this time.

I am going to pull the interior over the winter and add a full coating of 1/2 sound deadening foam throughout, should help with that I hope!
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Old Today, 11:10 AM   #29
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A little late to the game on this one, but I am also running the Pypes 2.5 full exhaust when I did the LS swap. They were the only one I could find that had a 2.5 for a wagon. It has one hell of a drone at 2400-2600 RPM, which of course is my cruising RPM at this time.

I am going to pull the interior over the winter and add a full coating of 1/2 sound deadening foam throughout, should help with that I hope!
wagons are especially prone to drone. Traditionally the drone is 1800-2100 rpm and therefore it is not a big deal once on the highway depending on your transmission and rear. May I ask which Pypes mufflers you chose? What rear gears you have? Both of those can affect the drone significantly.

Also, make sure all your exhaust attachment points are insulated. ie have rubber between the body and the exhaust system.
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Old Today, 01:29 PM   #30
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wagons are especially prone to drone. Traditionally the drone is 1800-2100 rpm and therefore it is not a big deal once on the highway depending on your transmission and rear. May I ask which Pypes mufflers you chose? What rear gears you have? Both of those can affect the drone significantly.

Also, make sure all your exhaust attachment points are insulated. ie have rubber between the body and the exhaust system.
I used the supplied mounts that came with the kit. So there is the rubber insulation between the body and exhaust.

I ordered the Street Pro mufflers as they were supposed to have the least amount of drone.

3.73 gears behind an 6L LS and a 4l80e so cruise RPM is right around 2400-2600.

I had contact on here with someone else from Pypes when I first purchased the kit as I was curious if they had actually installed their kit in a wagon, fitment is an issue, though you cannot sell a kit to fit every engine combination out there, the tailpipes themselves (which is the whole point of buying a wagon specific kit) is not as good as expected and resulted in removal of the shock bar and having the run the shocks in the stock location.

I ran into a few more issues with that kit, but hopefully some of them can be resolved once I get the car up on an lift to do some work instead of working on my back under jackstands.
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