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  1. #1
    Jr. Mechanic b-radical's Avatar
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    Default Intake and Exhaust.

    yo' whats up. On a 4.8L v8, will changing from stock exhaust to a 3 inch pipe from the cat back with performance muffler change gas mileage? Also how will putting a high flow intake on affect gas mileage? Thanks.

  2. #2
    Jr. Mechanic
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    I have the 4.8l v8 also and it doesn't bother it too much. It all just depends on how you drive it once you have the exhaust. What year is your truck, and performance mufflers don't do too much. With intake and exhaust you're looking at gaining maybe 10+ hp but if you chip it you'll get even more.

    Got pictures?

    2003 Silverado 1500
    Superchip Programmer
    20" Black Powdercoated Silverado SS Rims
    35 watt 5000k Low Beams
    55 watt 6000k High Beams
    Functional Ram Air intake with K&N filter
    Custom Side Exit Exhaust
    3% Window Tint
    Custom Painted Grill
    Halo Projector Fog Lights
    Outdoor Soundsystem
    2 12" Kenwood Carbon Fiber Cone Subs
    Custom Black Headliner

    :fighting0072:
    [/COLOR][/LEFT]

  3. #3
    Master Mechanic TritonBoulder47's Avatar
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    Here's how I explain it to my friends that aren't too car savy...

    Basically your engine is an air pump... The easier air and go into and exit from it, the more efficient it will be...

    So, yes, putting a perfoemance exhaust and intake will increase your mileage and HP, but you have to still drive normally... Sticking your foot in it at every stop sign and red light will drop you rmileage, no matter how mane performance / ecomony mods you do...


    Hope this helps...

    Tim a.k.a. Da' Boulder

    2003 Chevrolet Avalanche Z71 - Custom Emergency Response POV

    Firefighter, Fire Policeman, Ambulance Driver, Rescue Tech, Emergency Lighting Installer

    Tint, 20's, Bull Bar, Intake, Exhaust, Billet Grill, Stereo, Custom Console, Emergency Equipment, and the list goes on...

  4. #4
    Jr. Mechanic b-radical's Avatar
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    cool guys thanks. This is pretty much what i thought. Thanks for clearing it up. And my truck is a 2000. I have pics on my profile but havent figured out how to get them in my posts yet. Thanks again.

  5. #5

    Default

    yes any improvement in HP will always decrease your gas milage, even if its a little.
    1997 K1500 Silverado 4X4. Black Exterior, grey/black interior. 35X12.50X15 wheels and rubber, ProComp 6inch lift 6 shocks in the front 2 in the rear, 3 inch body lift, a few cosmetic mods. Nothing major. Custom leather interior, and stereo upgrade is the future mods.


  6. #6
    Jr. Mechanic b-radical's Avatar
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    wait now im confused again. can someone clear this up, please?

  7. #7
    Jr. Mechanic b-radical's Avatar
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    project reaper I think you may be wrong, I have the exhaust system in and have been running in for about a year, I gained 1 mpg, and have more power. big up SOCAL!

    intake coming soon, will give full report


    2000 Silverado, 4.8L, LS
    3" Dynomax cat back exhaust
    Drop-in K&N air filter
    200 amp Nations alternator
    KYB GR2 Shocks
    Bluetooth OBD2 adapter with Torque App on Samsung Note 2
    Custom Stereo System l Pioneer/ Boss door Speakers l 1200 watt Performance Teknique amp l 1 farad capacitor l 2 12" kicker comp subwoofers
    Slider rear window l Locking tailgate, de-baged l 265/75/16 Bridgestone Dueler H/L tires l Fully synthetic oil l Tinted windows
    4l65e upgrades - five pinion planetaries l HD sun shell l high performance band

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