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#1
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Hi,
I just switched from the Street Pro muffleres to the Race Pro muffleres. Everything the same except the mufflers, so you can hear the difference and get a little help to decide ![]() 1. Street Pro mufflers - similar sound to Flowmaster 40 https://youtube.com/shorts/ln0biiC776Q 2. Race Pro mufflers - similar sound to most straight through mufflers https://youtube.com/shorts/PMXlY4OTbTw I like both sounds, but the Race Pros are noticable quieter and deeper, which I prefer. Both are not quiet in my opinion, but the Street Pros are a lot more noticeable, especially at idle. Any questions.... please ask ![]() |
#2
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I like the Race Pros, also. Sounds like a huge difference and this is fantastic documentation. Beautiful car, also.
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Chris D 69 GTO Liberty Blue/dark blue T400, 9" w 3.50s, 3905lbs 461, 850 Holley, T2, KRE 310s, Comp HR288 w 165s, RA manifolds, 11.60@114, 1.58/60 The spare: 467, 850 Holley, T2, Edelbrock Dport 310cfm w RA manifolds, HFT 245/251D .561/.594L, 11.59@ 114, 1.57/ 60' |
#3
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thanks
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#4
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Now you know why PYPES tells you right there on their website that the Race Pro mufflers are quieter than the Street Pro mufflers.
They weren’t kidding.
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#5
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#6
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I've switched back and forth between Race and Street Pro's on a couple different cars when experimenting. The Race Pro is definitely quieter than Street Pro's, despite what their names might insinuate.
The problem with both of those mufflers if you're looking for something quiet, is that they are short 14" mufflers so they are only going to muffle sound so much. Pypes doesn't make them any larger unfortunately. That's why most people go for the Dynomax as they are available in 14" and 20" so if you're looking for something with a little more noise control, obviously the 20" will do a better job at that. These days I typically always go for a Dynomax muffler, either turbo or welded case depending on application. |
#7
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No problem, there are 18" Race Pro mufflers as well:
https://www.pypesexhaust.com/product...vr30?sku=MVR30 FWIW |
The Following User Says Thank You to Kenth For This Useful Post: | ||
#8
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Probably above my pay grade, but are they saying a highly restricted stock exhaust system will make my lo-po 350 happier? At some point I need to replace the obnoxious glass packs with something way quieter so these sounded like a good option.... until the fine print caught my attention. And "Think of these mufflers as large inhalers for your engine". Huh? Mike |
#9
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street pros are a chambered muffler like the slow-masters... race prose are a perforated straight through pipe with packing material in the case, like dynomax ultraflo's.
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The Following User Says Thank You to 78w72 For This Useful Post: | ||
#10
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Looks like pypes now has a "turbo pro" muffler too, same basic design as the super turbo from dynomax, should be the quietest of all their mufflers.
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#11
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18 is getting better. Must be a new addition since I last dealt with pypes. Looks like they are starting to follow dynomax's lead. Likely more people experienced what I pointed out and they are actually doing something about it. Good on them.
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