Cold Air Intake Vs Exhaust System

Discussion in 'Performance & Fuel' started by OHChevy03, Apr 21, 2011.

  1. OHChevy03

    OHChevy03 New Member

    I've had my truck for almost a year now and am looking into doing a mod or two. I was looking to hear some opinions on the benefits of both a Cold Air Intake and an Exhaust System on MPGs and HPs. I'm not looking to have an exhaust system that is extremely loud, just louder than stock (if I go that route). Also, I have heard that CAI can make the engine sound a little louder, is this true? Any comments are welcome.

    TELORVEHC New Member

    A CAI and a better exhaust will give you an increase in HP and maybe a slight increase in MPG as well. However, don't expect a lot of gains from either upgrade by itself. When you have an intake, an exhaust and other upgrades such as headers or a custom tune all on your truck, you will see much bigger improvements than having just a single upgrade. A CAI might change the engine sound a little but idk.
  3. Blacksheep1

    Blacksheep1 New Member

    I had a cai on my 89, it sounded alittle but not as much as the exhaust
  4. Enkeiavalanche

    Enkeiavalanche Moderator

    It all depends on your foot... If you have a heavy one then you will not get better MPG's.. As for a good exhust with low noise Corsa would be a good one to look at.. Also what a lot of people over look if you are going to take your 5000LBS Truck faster look in to better breaks too...
  5. jojovortecmax07

    jojovortecmax07 New Member

    I just installed the Airaid MIT and it definitely is louder than stock. The reason why CAI works better than stock, or I should say one of them, is that the air path is simplified which means the removal of the resonators(pockets) that the stock intake tube has to reduce the sound.
  6. OHChevy03

    OHChevy03 New Member

    Okay would it make more sense to leave the filter and filter box stock and just add a new, larger tube? Would this make the engine run more efficient? If I go this route along with a exhaust system would this improve HP and MPGs?
  7. Rockstarrchevy81

    Rockstarrchevy81 New Member

    I just installed a K&N Air Filter and dual exhaust's with a Flowmaster super 40 Series dual in / dual out and i can a good bit of difference from my straight's i had. I plan on installing a x pipe which will help me get a few extra HP and some torque and help the exhaust flow more evenly. I believe this will help some also and i will buy header's later on down the road but these mod's together you will see a difference...
  8. jojovortecmax07

    jojovortecmax07 New Member

    I would recommend buying either the Airaid MIT and just get a drop in filter of whatever brand. Keep the OEM airbox as it is already basically a CAI. It is on my 2007 VortecMax 6.0L. Not sure if yours is.

    If you look at the sticky about CAI you will see that the stock air intake with just a k&n drop in filter performed about as good as all the other expensive CAI kits. Therefore reasonable deduction will tell you that basically a Airaid MIT or something similar will give you equal performance at a fraction of the cost. The Airaid MIT does make more noise than stock, but only when you are into the throttle heavy. At cruise I hear no more engine noise than with the stock setup.

    Now you have air coming in at a greater rate, thus you need to provide a place for it to go. Best solution would be long tube headers and an exhaust system. I am looking into Banks Monster Exhaust as I am going to stick with a 2-1 setup. I am not looking for a noise machine but just a more efficient intake and exhaust process. The more efficient you make it the better HP and MPG you get.

    Now my problem is that I like the new growl and the perceived pickup so my gas mileage has actually dropped. I went from 15.2 avg to 15.0 avg and I will say that I am giving it more throttle and goosing it more than I used to. So I will take a hit of only .2 mpg for now and when I get over the newness I'm sure I'll see a slight overall increase in mileage.
  9. adampaul1964

    adampaul1964 New Member

    Volant CAI and Gibson cat back exhaust, you won't be disappointed.
  10. KyleZ71

    KyleZ71 New Member

    If you wanna do exhaust I recommend these guys (my kit is on it's way). They will build the kit for your truck so you dont need to remove the spare tire. Right now free shipping and 10 percent off.
  11. I'm running the Banks CAI, you can see on my photo album and a Magnaflow exhaust, not too loud even when you get on it.
  12. Sierraowner5.3

    Sierraowner5.3 New Member

    i have a spectre cold air ($140 at advance) and flowmaster exhaust.... the CAI added some growl when i got on it, but with the flowmaster on i never hear the CAI anymore.

    i picked up .5 mpg or so, then with the hypertech i got a little more. itll vary based on the vehical and how you drive.

    best thing i can tell ya is do the research and get what you like, not what someone else tells you to. especially someone like me, who just pretends to know what hes talking about. :happy:

  13. OHChevy03

    OHChevy03 New Member

    Right now I'm leaning towards doing a 1 in, 2 out exhaust, not a true dual exhaust system along with replacing the stock intake tube with a larger tube. Am I looking at getting an increase in MPGs if I am able to keep my foot off the pedal?
  14. Caldwell

    Caldwell New Member

    ^^^^ pretty much thats the hardest part with either mod...

    when you put on the intake, or exhaust, or both. It's only natural your going to want to hear the truck roar, and you wont notice yourself pushing your put alittle more to the floor. If and when you can control that urge, thats when your going to notice a difference in you trips to the gas station...

    If your good, id say about 1 or 2 tanks and you'll be able to control yourself from dropping the hammer all the time...
  15. Rockstarrchevy81

    Rockstarrchevy81 New Member

    Yeah i def. agree with what CALDWELL said but i had straight's and they guzzled gas especially since they were true dual setup with 2.5 inch pipe. I installed a Flowmaster super 40 series dual in/dual out which is still true dual but the gas mileage is better along with HP and Torque and back pressure my truck use to have lag no doesn't at all and since i put a drop in K&N air filter it's helped also ha.I know this week when i get my x pipe installed i will be on the gas even more to see how much it helped and how it will perform. I know i got allot more power now cause now i can mash on the gas at a complete stop and leave black tire mark's on the pavement and i have 33 13.50's so overall i'm happy but will be happier once i installed my Pacesetter Quik Trip Long Tube header's next week also!

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