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Thread: New Dynomax 4" Exhaust Installed - WOW!

  1. 04-24-2002, 03:36 #1
    6.6L&94ImpalaSS
    6.6L&94ImpalaSS is offline Enthusiast
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    Cool

    Well, my friends at the Dynomax engineering facility here in Jackson, Michigan needed my truck for their 4" exhaust system measurement and installation. The good news was when they were done, I got to keep the system.

    Today was the first day with the system on and all I can say is WOW! Very nice sound and definitely improved performance.

    Exhaust specs:

    4" down pipe - Stainless
    Rest of the system except for the muffler (Stainless) is very thick Aluminized steel. I believe .080 thick.
    Oval chrome tip

    Now its time to save for the "Juice".

    Mike
    2001 Silverado Crew Cab 4X4 Duramax<br />Check out my NEW SS Pics and Truck at - <a href=\"http://www.mikebroughman.com\" target=\"_blank\">www.mikebroughman.com</a>
  2. 04-24-2002, 05:28 #2
    JRiley
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    Thumbs up

    Any idea on release date and pricing?
  3. 04-24-2002, 08:33 #3
    bora
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    Why not build all of the system from stainless steel?
    2002 2500 HD Duramax Diesel Crew Cab Short box 4x4<br /><br />OEM Running Boards, Hidden Hitch front end hitch, step covers, and driven like there is an egg under the gas pedal
  4. 04-24-2002, 09:55 #4
    Charles
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    It is cheaper not to use stainless steel. Aluminized will hold up just fine for most people, unless you drive on salted roads a whole lot.
    Charles - 98 Firebird with mods &<br />Dad\'s 2002 GMC SLT EC/SB 4X4 Duramax/Allison<br />Pendaliner bed liner, Westin nerf-bars, Husky floor mats<br />bugshield, Bed X-teder, Rawson-Koenig toolbox, bed rails
  5. 04-24-2002, 10:50 #5
    bora
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    But the factory system is stainless steel if I remember correctly. For me going to non-stainless steel is a downgrade even though I live in California and will see snow a few weeks a year at most.

    I wished someone made a 4 " stainless steel setup.
    2002 2500 HD Duramax Diesel Crew Cab Short box 4x4<br /><br />OEM Running Boards, Hidden Hitch front end hitch, step covers, and driven like there is an egg under the gas pedal
  6. 04-24-2002, 12:32 #6
    sonofagun
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    Bora,
    There are a number of SS 4" systems available. Try Banks for regular stainless and Billyboat for high end stuff. Both are MUCH more than alum. steel.

    Good luck,
    Bob
    2001 GMC 2500HD D/A, CC/SB,<br />Olympic White, *Manik SS brush guard and nerfs, *Hella driving lamps, Velvet rides, *HD Air Lifts and Compressor, *Snugtop bed cover, *Linex, *Yakima rails on cover (mt.bikes), *Amsoil 2 stage airfilter. *Pioneer XM Radio. *SUBSTANTIALLY upgraded speakers,<br />Amp and Sub. *One piece drive shaft. *Mag-Hytec diff.cover, <br />*43 gal across the bed aux.tank (American Tank), *Lucerix pwr / heated mirrors, *Allison deep pan and transyd, *Street Pilot III GPS. *Suburban-type lighted <br />double sun visors, homelink system,steering wheel stereo controls, *Kennedy
  7. 04-24-2002, 13:49 #7
    6.6L&94ImpalaSS
    6.6L&94ImpalaSS is offline Enthusiast
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    Cool

    JRiely - I will get the part # and post it soon.

    Bora - Charles is right on why the whole thing is not stainless - COST.

    I will say that the aluminized pipe that the Dynomax system uses is much thicker than I have ever seen on any exhaust.

    Mike
    2001 Silverado Crew Cab 4X4 Duramax<br />Check out my NEW SS Pics and Truck at - <a href=\"http://www.mikebroughman.com\" target=\"_blank\">www.mikebroughman.com</a>
  8. 04-24-2002, 14:41 #8
    Joe Dawson
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    Does Dynomax have a web site?
    2001 GMC 2WD 2500 HD D/A CC Long Bed 6500 lbs.<br /><b><a href=\"http://www.airliftcompany.com/superduty.htm\" target=\"_blank\">AirLift Superlifts</a></b> , <b><a href=\"http://www.lucerix.com/xmount.htm\" target=\"_blank\">Lucerix Mirrors</a></b><br /><b><a href=\"http://www.fumotovalve.com/merchant.cfm?id=88&step=2\" target=\"_blank\">Fumoto Drain Valve</a></b> , Delvac 1<br /><b><a href=\"http://www.pecuniary.com/synthetics/bypass/dualremote.html\" target=\"_blank\">Amsoil Dual Remote Oil Filter</a></b><br /><b><a href=\"http://www.campingworld.com/browse/skus/index.cfm?skunum=18009&src=SRCH&tcode=37\" target=\"_blank\">Chieftain Air Horns</a></b><br /><b><a href=\"http://www.duallydepot.com/\" target=\"_blank\">53 Gal Fuel Tank Toolbox Combo</a></b><br /><b><a href=\"http://www.dtacorp.com/index.htm\" target=\"_blank\">DTA Running Boards</a></b><br /><b><a href=\"http://www.dakotadigital.com/index.cfm\" target=\"_blank\">Dakota Digital Gauges</a></b><p><b><a href=\"http://www.sunnybrookrv.com/\" target=\"_blank\">2001 Sunnybrook 31ft. BWFS</a></b><br /><b><a href=\"http://www.precisiontemp.com/RV-500Page1.html\" target=\"_blank\">Precision Temp Tankless Water Heater</a></b><br /><b><a href=\"http://www.fortunecity.com/marina/finisterre/1228/jorjan/index.htm\" target=\"_blank\">Jordon Ultima Controller</a></b><br />Honda EU 3000 Generator
  9. 04-24-2002, 19:37 #9
    Mic
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    Thumbs up

    Joe

    They are a division of Tenneco.

    IIRC... http://www.tenneco-automotive.com/
  10. 04-24-2002, 20:01 #10
    hoot
    hoot is offline Gone, but not forgotten...
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    I've been hearing that the grade of stainless (409) our exhaust is made out of is very low quality but I did some research that makes me think it's not so bad.....

    Do not clean with Steel Wool or a Steel Brush ---&gt; surface rust will result.

    ....409 (Ferritic) stainless steel alloy is often used for casket manufacturing because it's known for its properties in resisting atmospheric oxidation and high durability in outdoor use.
    http://www.funeralplan.com/products/stainless.html

    409 type Stainless Steel is specially designed for automotive exhaust systems.
    409 type Stainless Steel resists atmospheric and automotive exhaust gas corrosion.
    409 type Stainless Steel developes a light surface discoloring which will retard progressive corrosion.
    409 type Stainless Steel contains 10.5%...11.75% Chromium

    http://www.stebro.net/stwc.htm

    Here is a key note!!!!

    In recent years, however, and with the upcoming US government requirement for a 100,000 mile exhaust capability, other alloys have been becoming more prevalent.

    http://www.suppliersonline.com/propertypages/409.asp

    [ 04-24-2002: Message edited by: hoot ]</p>
  11. 04-24-2002, 23:25 #11
    stillracing
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    I convinced myself the 4" exhaust was not needed in the Dmax. I ended up with 4" exhaust installed this past weekend. I was wrong!! 4" exhaust is the way to go!! MOPOWER
    2K2 Silverado 3500 LT 4x4 Duramax/Allison Crew Cab Loaded Pewter Owner since 01-05-02<br />JL Audio AMPS And SPEAKERS /3x10\" Subwoofer & hundreds of watts<br />Amsoil synthetic fluids<br />Amsoil Dual Remote oil filter<br />Pryo 2001 dual EGT guage<br />Kennedy light harrness plus lights<br />4\" exhaust<br />RS9000\'s<br />Etrex Legend GPS trip computer
  12. 04-25-2002, 11:05 #12
    Bwag
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    Thumbs up

    I got my Allied system installed on 4/5

    and all I can say is it's awesome sounding and the price was right too.

    I highly recommend www.sourceautomotive.biz
  13. 04-25-2002, 12:05 #13
    wizkid
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    Question

    Is the 4" LOUDER? I like quiet! That was one of the reasons I got the DuraMax
    Indeglow Blue D/A 2500<BR>Extended cab LT Driving it!<BR><A HREF=\"http://truck.wizkid.com\" TARGET=_blank>My Truck Page</A>
  14. 04-25-2002, 12:58 #14
    Alli-max
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    wizkid... more exhaust flow = higher decibels in most cases, if not all. And yes it is a LITTLE louder with the Kennedy setup. I would take a stab at saying 10 - 15%??
    2001 JUICED GMC 2500HD SLE AlliMax, Longbed, Ext. Cab, 4X4 Summit White, G80 Differential, Husky Liners, Black UWS Toolbox, Black Westin Nerfs, Black Replacement Front and Rear Bumper, Black Bedrail caps, Autopage 2 way LCD Alarm remote start,JL Audio, Hella, Cobra, ProComp Mud Terrains, Tekonsha Prodigy Controller, Fumoto, Rhino Liner, 400 Watt Inverter, Pioneer XM Radio<br />KENNEDY 4\" Exhaust. 100,000 miles on January 31,2003!!<br /><a href=\"http://home.att.net/~markstanco\" target=\"_blank\"><b>PHOTOS UPDATE 11/02</b></a><br /><br />Gutter Pipe is your friend. Leafblower is your enemy.
  15. 04-25-2002, 13:49 #15
    6.6L&94ImpalaSS
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    Cool

    Still waiting on the part number, but the cost is $350.00.

    Dynomax website is www.dynomax.com


    Mike
    2001 Silverado Crew Cab 4X4 Duramax<br />Check out my NEW SS Pics and Truck at - <a href=\"http://www.mikebroughman.com\" target=\"_blank\">www.mikebroughman.com</a>
  16. 04-25-2002, 15:30 #16
    mark45678 Guest

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    the part numbers are on there site in the PDF. section! 4" from the down pipe back,It didnt look like they changed the stock down pipe?
  17. 04-25-2002, 15:44 #17
    6.6L&94ImpalaSS
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    Cool

    The system they did for me included the 4" down pipe. The informed me it would be included in the crew cab system.

    I will keep everyone informed.

    Mike
    2001 Silverado Crew Cab 4X4 Duramax<br />Check out my NEW SS Pics and Truck at - <a href=\"http://www.mikebroughman.com\" target=\"_blank\">www.mikebroughman.com</a>
  18. 04-25-2002, 18:20 #18
    big dipper
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    I think some are refering to the first pipe that bolts to the cast pipe with a band clamp as the down pipe while others are refering to the cast pipe that bolts to the turbo as the down pipe. Most kits (actually all of them) DO NOT replace the pipe that bolts to the turbo so..... it would be safe to say they are talking about the first pipe from the band clamp on back.
  19. 04-26-2002, 14:32 #19
    6.6L&94ImpalaSS
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    Cool

    Well the part numbers are as follows:

    Down Pipe (Sold seperate from the kit and available in two weeks) - 54194

    Exhaust kit - 19375

    This is for Crew Cab.

    Mike
    2001 Silverado Crew Cab 4X4 Duramax<br />Check out my NEW SS Pics and Truck at - <a href=\"http://www.mikebroughman.com\" target=\"_blank\">www.mikebroughman.com</a>
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