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a good exhaust system for a 1998 GMC 2500 regular cab

Discussion in 'Chevy Trucks' started by meathead1134, Mar 19, 2006.

  1. meathead1134

    meathead1134 Senior Member
    from MA
    Messages: 170

    I've been trying to do some research for an exhaust system for my truck 1998 GMC 2500 regular cab. I've found a ton of exhausts for a 1/2 ton but haven't found much for a 3/4 ton truck. Flowmaster makes 1 but it isn't stainless steel which I'm looking for, you guys got any ideas??? I would like a pretty good rumble, I've though of glasspacks but I'm concerned with emissions in MA.
  2. Antnee77

    Antnee77 PlowSite.com Addict
    from RI
    Messages: 1,056

    You have the 5.7 (350)?
  3. meathead1134

    meathead1134 Senior Member
    from MA
    Messages: 170

    yes I do the motor is very strong
  4. firelwn82

    firelwn82 PlowSite.com Addict
    Messages: 1,866

    I dont like flowmaster I think there junk. Own opinion. What I would lead you to is a Dynomax or a Borla, excelent for me Borla is mello and highway is quite same with Dynomax. Flowmaster is just way to loud and never seems to quite down no matter RPM's. Glass packs are junk, you'll replace more than oil.
  5. chevyplowboy

    chevyplowboy Junior Member
    Messages: 19


    Best mufflers for chevy are flowmasters they sound good and add horsepower to your truck. midas will install stainless steel exhaust with the flowmaster muffler.
  6. PLOWMAN45

    PLOWMAN45 2000 Club Member
    Messages: 2,951

    flow master huh gotta see if they make one for my 6.0
  7. Antnee77

    Antnee77 PlowSite.com Addict
    from RI
    Messages: 1,056

    I'd go with a Vortex muffler (dual inlet, dual outlet) and run either aluminized or stainless pipe out the back and have a nice dual setup. My buddy had aluminized pipes custom bent straight out the back with a Vortex dual inlet dual outlet muffler, installed for $350. What does the stock setup look like now? Is it just one cat and a single inlet, single outlet muffler?
  8. DeereFarmer

    DeereFarmer PlowSite Veteran
    Messages: 3,296

    Get Flowmaster. It is the only way to go for Chevy's. I have a 40 series and love it. Go to any Lou's Custom Exhaust in the area and they will hook you up!
  9. Yaz

    Yaz PlowSite.com Addict
    from NH
    Messages: 1,061

    Yes I agree Lou's can just fabricate a custom setup.

    *2.5" aluminumized pipe
    *40 series Flowmaster muffler single inlet, dual outlet
    *Yukon Denali tips- I had strait back and changed, strait sounded louder but fills with snow! Angled is better suited for plowing.
    *leave the cat on to be emissions legal.

    It sounded and looked awesome, It was on 5 years and still was in perfect shape.

    99 gmc.jpg

    99 gmc exhaust.jpg
    Last edited: Mar 21, 2006
  10. DeereFarmer

    DeereFarmer PlowSite Veteran
    Messages: 3,296

    Sounds familiar. I have the original 40, single in/ dual out, 2.5" aluminized pipe, and 4" stainless steel tips 45 degree out the back. It is a great setup!
  11. Jim Prill

    Jim Prill Member
    from Zion Il
    Messages: 74

    Just my two cents as an exhaust installer. I would suggest magnaflow for its all stainless construction.:nod:
  12. PLOWMAN45

    PLOWMAN45 2000 Club Member
    Messages: 2,951

    700.00 buck for magnaflow set up :nono:
  13. Brett K

    Brett K Member
    Messages: 42

    DOn't buy the whole catback. Just get the Magnaflow and have your shop do the rest. Another option is Flo-Pro. Flowmasters create a horrible drone in the cab. They are about the loudest muffler out there. Too many they sound great. I have never seen a dyno of a flowmaster resulting in increased hp either, usually it will cost you some. If you want a stainless kit, check out Gibson. If this is a plow truck, you may want to go with single exhaust. Dual exhaust means reduced back pressure and will cost you a little torque at low rpm and gives you more hp at higher rpm, the opposite of what you want.