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04-29-2016, 07:48 AM
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#1 |
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Registered User
 
Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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What Exhaust?
Well the stars aligned last weekend and I was finally able to get the truck back to running condition. Now it's time to ship it off to the local exhaust shop to connect to the new headers & wondering what everyone likes as far as mufflers. When I bought the truck it had dual flowmaster 40s with turn downs before the axle and was way too loud for me. I'm trying to decide between flowmaster 70 series or 50 series. If your running one of these two mufflers or have other opinions, please sing out.
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1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010  2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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04-29-2016, 11:23 AM
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#2 |
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Registered User
Join Date: Jun 2014
Location: Longmont, Colorado
Posts: 252
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Re: What Exhaust?
This might help, JEGS flowmaster series test
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Folks that throw dirt on you aren't always trying to hurt you, and folks that pull you out of a jam aren't always trying to help you. |
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04-29-2016, 11:33 AM
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#3 |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,484
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Re: What Exhaust?
My 69 C10 had 2.5" Flowmaster 50 series "Delta Flow" mufflers. Even with tailpipes exiting under the rear bumper, interior resonance was very bad. I ending up using Dynomax Super Turbos with a 20" case. Still some resonance but nowhere near as bad as the Flowmasters. And they cost about half as much!
No direct experience here, but I've read that the Flowmaster 70s are much quieter than the 50s etc., but they are very expensive.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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04-29-2016, 12:02 PM
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#4 |
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Registered User
Join Date: Jun 2015
Location: Richmond,KY and Knoxville,TN
Posts: 1,584
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Re: What Exhaust?
Borla.
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04-29-2016, 05:05 PM
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#5 |
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Registered User
Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Re: What Exhaust?
Which Borla? I've been listening to the sound clips on youtube and Borla's site and I have to say they sound good. Might seriously consider them. By the way, does a larger muffler case = a quieter muffler?
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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04-29-2016, 05:12 PM
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#6 | |
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Registered User
Join Date: Jun 2015
Location: Richmond,KY and Knoxville,TN
Posts: 1,584
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Re: What Exhaust?
Quote:
This setup is a dual all custom mandrel bent 3" X pipe exhaust from headers back no neck downs. I love the way the XR1 sound. 385 stroker motor. https://m.youtube.com/watch?v=mLVSye...ature=youtu.be https://m.youtube.com/watch?feature=...&v=gpL-eb8IsnM |
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04-29-2016, 07:26 PM
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#7 |
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Registered User
Join Date: Jan 2016
Location: Hood County Texas
Posts: 63
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Re: What Exhaust?
Magnaflow, more hp than Flowmasters, and produce about the same as Borla ..
Sound is subjective, I hate the way Flowmasters sound, Magnaflows I like.
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1985 K20 4spd 1978 K20 4spd |
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04-29-2016, 09:13 PM
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#8 | |
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Registered User
Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Re: What Exhaust?
Quote:
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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04-29-2016, 09:23 PM
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#9 | |
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Registered User
Join Date: Jun 2015
Location: Richmond,KY and Knoxville,TN
Posts: 1,584
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Re: What Exhaust?
Quote:
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04-29-2016, 09:34 PM
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#10 |
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Registered User
Join Date: Jun 2015
Location: Richmond,KY and Knoxville,TN
Posts: 1,584
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Re: What Exhaust?
The XR1 is a race muffler the Pro XS isn't. But here is a cruising video so this will give you a idea of how the XR1 race mufflers sound just cruising. That's the thing about Borla mufflers crusing nice and deep and mellow tone but when you stand on it the gates of hell open haha.
https://m.youtube.com/watch?v=JUNFSeLhSlw |
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04-30-2016, 06:54 AM
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#11 | |
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Registered User
Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Re: What Exhaust?
Quote:
Well I went back to YouTube and listened to a bunch of sound bites from Magnaflow & Borla. Probably hard to get a real sense what they'll sound like on my stock '78 with all the sound clips being of newer trucks and what vintage trucks are on there, most are built in some way or another. They're very close but I like the tone better on the Borla so I broke down and ordered two of their Pro XS with the longer 19" case off Amazon for $99 each w/ free shipping. Fingers crossed. Any suggestion on using an H or X pipe. I would think space might be somewhat limited with the transfer case and carrier bearing in the way but ultimately that's for the exhaust shop to figure out.
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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