Thread: W-Body Custom Exhaust Build

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  1. #1 W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    I know there's quite a bit of exhaust threads asking which parts to get or what choices there are so I decided to draw up my custom exhaust build and add some info. There is a lot of detail lol but that's because I've been bored since I got laid off last week.

    The dynomax #41806 part number for the adapter is from the dynomax kit made for our cars (19363). The size is 2 1/4 but it can be expanded if needed to fit.

    You don't need to purchase all the adapters but I built it this way for quick disconnecting, especially for the mufflers so I can easily change them out for state inspections.

    I recommend http://www.mandrelexhaustsystems.com because the make a solid exhaust at a decent price. They have single or dual options, 2.5 to 3 in, and aluminized steel or 304 stainless steel.

    04-08 http://www.mandrelexhaustsystems.com...rix/Categories
    97-03 They used to list exhausts for this generation but it seems they don't anymore or they're restructuring the site.


    W-Body Custom Exhaust Build by K H, on Flickr
    W-Body Custom Exhaust Build Attached Images
    Last edited by HighOctaneRacing; 07-04-2017 at 12:48 PM. Reason: new photo
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  2. #2 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie machinegunsquid's Avatar
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    YAY informative exhaust thread!!!

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  3. #3 Re: W-Body Custom Exhaust Build 
    I live here. theaceofspades's Avatar
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    That's a sweet pic
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  4. #4 Re: W-Body Custom Exhaust Build 
    GT Level Member Nitvid's Avatar
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    True duals not an option for these cars? or not worth it?
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  5. #5 Re: W-Body Custom Exhaust Build 
    I live here. theaceofspades's Avatar
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    Quote Originally Posted by Nitvid View Post
    True duals not an option for these cars? or not worth it?
    If you like your ears intact and not bleeding lol
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  6. #6 Re: W-Body Custom Exhaust Build 
    ... osiris94ej's Avatar
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    Quote Originally Posted by Nitvid View Post
    True duals not an option for these cars? or not worth it?
    It has been done before. There is a video of a regal with true dual set up floating around YouTube.

    Found it..
    Supercharged 1999 Regal GS by Buick true dual flo…: http://youtu.be/WnI6sgX5rVg

    Sent from my XT1080 using Tapatalk
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  7. #7 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    it's been done before but I've heard true duels will scrape. Just to mod some headers to fit true duals isn't really worth the cost plus lining up the exhaust pipes under the car is going to be a hassle.

    here is more info
    http://www.gpona.com/forums/97-03-gr...st-t27289.html
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  8. #8 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    My gf's car sounds better and louder than that and all she has is the full dynomax catback kit
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  9. #9 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie ItHurtz's Avatar
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    mandrel took out the 97-03 because the 04+ are the same thing. Yes I know because I have the 04+ on my 2000
    2000 GTPT Sold-brandonhall10 built trans
    2009 Challenger SRT8
    http://www.grandprixforums.net/threa...uestion.....no
    Expert at being gay.
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  10. #10 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    That's what I figured but didn't want to post it in case **** happens for whatever reason
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  11. #11 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    Just wanted to put this here as a little update.....

    Dynomax Flange 41806 by K H, on Flickr


    RockAuto $13.31 (you might have some trouble finding this, even in the part number search, but it's there)
    Autoplicity.com $14.52
    Summit Racing $14.97
    NAPA $21.99
    Last edited by HighOctaneRacing; 07-04-2017 at 12:55 PM.
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  12. #12 Re: W-Body Custom Exhaust Build 
    I live here. Slick2500's Avatar
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    Quote Originally Posted by HighOctaneRacing View Post
    My gf's car sounds better and louder than that and all she has is the full dynomax catback kit
    Can you make a vid of it sometime? I think Dynomax was the one I couldn't seem to find or find a good video of.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  13. #13 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    She lost the whole exhaust including the zzp cat-less dp when her car got totalled. Insurance wouldn't let her take the exhaust.... mother ****ers. I'll ask her if she has any videos tho.

    if you're interested, rock auto has the whole dynomax kit for $400. I got it for $300 cause I worked at NAPA lol. if you know anybody that works at NAPA they might get you a solid deal.
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  14. #14 Re: W-Body Custom Exhaust Build 
    I live here. theaceofspades's Avatar
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    Quote Originally Posted by HighOctaneRacing View Post
    Just wanted to put this here as a little update.....




    RockAuto $13.31 (you might have some trouble finding this, even in the part number search, but it's there)
    Autoplicity.com $14.52
    Summit Racing $14.97
    NAPA $21.99
    May have to buy this. I need a flange for my glasspack
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  15. #15 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    Scotty has a different flange set-up he could show you. I just prefer this and it's made for our cars
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  16. #16 Re: W-Body Custom Exhaust Build 
    I live here. Slick2500's Avatar
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    Quote Originally Posted by HighOctaneRacing View Post
    She lost the whole exhaust including the zzp cat-less dp when her car got totalled. Insurance wouldn't let her take the exhaust.... mother ****ers. I'll ask her if she has any videos tho.

    if you're interested, rock auto has the whole dynomax kit for $400. I got it for $300 cause I worked at NAPA lol. if you know anybody that works at NAPA they might get you a solid deal.
    Oh I didn't realize it was on that car. Yeah I saw it on Rockauto, that's why I was wondering lol. I don't know anyone who works at any of the parts stores :/
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  17. #17 Re: W-Body Custom Exhaust Build 
    GrandPrix Junkie HighOctaneRacing's Avatar
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    IDK if it would be cheaper to just get the mandrel exhaust systems kit and just buy the dynomax mufflers. The part numbers are 17667 & 17666. Also in case somebody doesn't know, the dynomax piping is not that ****ty crush bent garbage. It has real mandrel bends
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  18. #18 Re: W-Body Custom Exhaust Build 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by theaceofspades View Post
    May have to buy this. I need a flange for my glasspack
    go to your local muffler shop, ask for a flange. you then cut off a inlet tube or not, and weld the flange to the glass pack.





    also picked up all the parts for a u bend delete at the muffler shop. cost 25 bucks for the o2 bung, 10 inches of pipe one end flaired. and the flange.

    [IMG][/IMG]

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  19. #19 W-Body Custom Exhaust Build 
    I live here. theaceofspades's Avatar
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    Quote Originally Posted by Scottydoggs View Post
    go to your local muffler shop, ask for a flange. you then cut off a inlet tube or not, and weld the flange to the glass pack.
    So I don't need to cut off the inlet tube
    Also by your pic it looks like gm sold me the wrong exhaust gasket. So that's awesome
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS
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  20. #20 Re: W-Body Custom Exhaust Build 
    Killa Bee Scottydoggs's Avatar
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    nope. you can weld the flange to the pipe. i cut mine off to make it 2 inches shorter so it would fit right.

    i measured my stock res, bought a gp a bit longer res was 30, gp 32".

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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