Exhaust & Long Tube Headers Suggestions

Discussion in 'V8 5.0L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by WhiplashGo, Aug 12, 2019.

  1. WhiplashGo

    WhiplashGo Well-Known Member

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    I have a 15' GT automatic with the following mods done: Lund Flex Fuel Tune, Mishimoto Inlet Tube, Velossa Big Mouth. Want to get most HP/TQ without going FI route.
    Want suggestions for exhaust & long tube headers. Not a fan of loud exhaust so I want the best gains but exhaust to sound close to stock. Also want to be able to pass NYS emissions testing for yearily inspections on both exhaust & headers.
     
  2. Jetnoise

    Jetnoise Well-Known Member

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    Lund ...if you are staying with them ..should be your first point of contact on achieving your goal. They might be able to point you to a known result.
     
  3. Zelek

    Zelek Well-Known Member

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    You should probably just avoid headers then. It's going to be a lot louder and with the rear O2's being relocated, it makes it far more difficult to ready the O2/HO2 setting to pass that part of the emissions.
     
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  4. Zinc03svt

    Zinc03svt Well-Known Member

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    Plus a million on skipping headers. Go cat delete if you must. Research 15-17 n/a power mods. Lots a threads. 18 manifold with E85 probably the best for induction to extend your power band.

    A lot of people make the mistake in believing a loud car is always a fast car... Lol.
     
  5. Ebm

    Ebm Well-Known Member

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    +1, skip headers and any cat modifications if you don't want trouble with emissions inspections.

    Also, any aftermarket exhaust will add noise. The closest to stock muffler with just a little noise added would probably be the GT500 mufflers.

    Honestly, I'd leave the exhaust system alone with what you have mentioned in your original post.
     
  6. BrandonS550

    BrandonS550 Active Member

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    18+ intake, E85 tune (Not flex fuel, timing will be conservative with flex fuel tune) and Circle D converter 4C converter. That's my plans at least.
     
  7. 3star2nr

    3star2nr Well-Known Member

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    ... Then DO NOT BUY HEADERS...

    hell dont buy anything more than an axleback...
     
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