Help choosing mufflers
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
Likes: 66
From: Tucson, AZ
Help choosing mufflers I finally got my L33 swapped 65 nova 4door running. I am running a ws6store high lift Asa cam, 1 3/4 headers and a 2.5" Pypes stainless exhaust with an x pipe. I started out with the violator mufflers from Pypes. They are crazy loud! My very unscientific method got 92db at the tailpipes. I can't even hear if my tires are spinning because it is so loud.
I am looking for something much quieter that still flows decent and won't kill power. I know that's a tall order.
Currently I am stuck between the Pypes Race Flow and the Borla ProXS mufflers. I also think I might be able to fit an 18" muffler rather than the 14" I have now. I have done a ton of searching on both of these and half say they are too loud/drone and half day too quiet/no drone. I know loudness is pretty subjective.
Has anyone tried both of these? Any thoughts or other mufflers I should check out? Thanks for any help or advice!
P.s. here is a clip with the current mufflers
https://imgur.com/a/ydhfGq2
I am looking for something much quieter that still flows decent and won't kill power. I know that's a tall order.
Currently I am stuck between the Pypes Race Flow and the Borla ProXS mufflers. I also think I might be able to fit an 18" muffler rather than the 14" I have now. I have done a ton of searching on both of these and half say they are too loud/drone and half day too quiet/no drone. I know loudness is pretty subjective.
Has anyone tried both of these? Any thoughts or other mufflers I should check out? Thanks for any help or advice!
P.s. here is a clip with the current mufflers
https://imgur.com/a/ydhfGq2
Last edited by Novapat67; Jan 12, 2023 at 08:42 AM.
TECH Addict
Joined: Oct 2016
Posts: 2,513
Likes: 480
From: PDX-OR-USA
I am running a L33 into a single 3" Flowmaster 70 , I like the sound , its got a nice mild rumble at idle and well up through the mid range, deans really get loud till your north of 4K.
I would imagine a pair of. them would be fairly quiet but they are HUGE..
I would imagine a pair of. them would be fairly quiet but they are HUGE..
Borla ProXS is my go-to muffler for a great sound that’s mild at cruise and loud when you open it up. Plus zero drone. Stainless bodies and lightweight. It’s a great performance muffler.
I'm a Borla pro xs fan as well. I have a first gen Chevy II wagon and like you had Pypes(Street Pro) mufflers and hated the obnoxious noise and drone. The Borla pro xs sound awesome with zero drone. Everybody that hears my wagon loves the exhaust and it's not too loud. I'm running 3".
Last edited by showdog75; Jan 12, 2023 at 07:42 AM.
Thread Starter
TECH Apprentice
Joined: Sep 2012
Posts: 347
Likes: 66
From: Tucson, AZ
Originally Posted by showdog75
I'm a Borla pro xs fan as well. I have a first gen Chevy II wagon and like you had Pypes(Street Pro) mufflers and hated the obnoxious noise and drone. The Borla pro xs sound awesome with zero drone. Everybody that hears my wagon loves the exhaust and it's not too loud. I'm running 3".
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Teching In
Joined: Feb 2022
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I don’t know if you bought anything yet.. but the Flowmaster Flow FX series sounds really good on our CT525 engine in our camaro.. super quiet coming off the headers, 18-20” of 3” pipe and then the mufflers with turndowns.
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