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Do K&N cold air kits actually do anything on a Silverado?

Discussion in 'Chevy Truck Talk & GM News' started by stchman, Nov 29, 2012.

  1. stchman

    stchman New Member

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    Do K&N cold air kits actually do anything on a Silverado?

    I had a cold air kit on my 2008 Silverado, but after getting my 2013 I decided on not getting one but instead just got K&N drop in replacement filter.

    It looks like on the Silverado that the K&N cold air intake uses a similar intake location as the stock setup uses. Is it that the cone shaped filter is a better design?

    Thanks.

    - - - Updated - - -

    After looking around, it looks like getting an Airaid MIT (Modular Intake Tube) is a good choice.
    #1
  2. RayVoy

    RayVoy Active Member

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    I agree stchman, IMO, the factory setup is a CAI. K and N might provide a little less restriction and a better intake tube is a good choice. Which brings up a question, there are sound baffles in the factory tube, do the streamlined tubes produce additional wind noise?
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  3. stchman

    stchman New Member

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    Yes, when I had a K&N CAI kit on my 2008 Silverado, I did notice a louder sucking sound coming from under the hood. Apparently the resonator chambers in the stock tube are designed to muffle the sound. The muffling of the sound does appear to create some restrictions in the air flow.

    Indeed the factory setup does appear to be a CAI type. The CAI for the Silverado from K&N runs about $240. A drop in K&N filter is $40 while a stright tube is ~$120. You can save $80 or so by going this route.

    Now the cone shaped air filter that comes with the K&N kit does have quite a bit more surface area and is probably a better filter than the drop in filter, but I cannot substantiate this.
    #3
  4. SurrealOne

    SurrealOne Former Member

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    I have a Volant CAI (and scoop) because I bought my truck used and it came with an Outlaw CAI (no longer made). After years of apparent service the special Outlaw filter fell apart and could not be replaced. Thus, I tossed a Volant under the hood because I needed a more standardized air box and liked how it looked and sounded in [MENTION=40941]aloxdaddy99[/MENTION]'s truck.

    That said, if I had never had the Outlaw or the Volant (i.e. if my stock air box was what was in the truck when I bought it), I'd have removed the stock airbox, cut the bottom out of it, placed it back in the vehicle and called it 'done'. I know [MENTION=40941]aloxdaddy99[/MENTION] espouses this, too ... and he's running a Volant, as well.

    That's nothing bad to say about Volant -- we like how our Volants look and sound. Rather, it's both of us trying to tell people that CAI's promise the world ... and do very little aside from alter the way things sound for the money you spend on them. You might see a few extra ponies at WOT by using a CAI ... but you can probably get most or all of those ponies for free by cutting the bottom out of the OEM air box and calling it 'done'. :)
    #4
  5. silverhobey

    silverhobey New Member

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    Surrealone:. What is WOT?? Thanks....Brian from Canada
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  6. RayVoy

    RayVoy Active Member

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    Wide Open Throttle..............Ray, from Canada, hahahahaha
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  7. silverhobey

    silverhobey New Member

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    that's hilarious..thanks, I think :lol:.....any snow down there??
    Brian from Ontario
    #7
  8. RayVoy

    RayVoy Active Member

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    Haha, nope, not yep, long range is calling for a little next week, only 1/2 cent, or so, won't last. A little cold this week, looking for some + temps next week.
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  9. stchman

    stchman New Member

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    I ended up buying the Airaid MIT. I had to pay $113 shipped for what was essentially a long black plastic tube, but it was the best price I could find. I got it at:

    http://www.4wheelonline.com/

    If anything it will sound better during WOT.
    #9
  10. The Heater

    The Heater New Member

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    If you're thinking it gives you more power over the stock set up, it does NOT.
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  11. stchman

    stchman New Member

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    I do believe that with a less restrictive air filter and a less restrictive tube, some performance gain will be realized.
    #11
  12. Pikey

    Pikey Moderator

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    There are multiple schools of thought about the cia systems. Older trucks like my 1995 or 2005 have a very restrictive tube, while the newer trucks tube is much less restrictive. Increases in performance may be more evident in older model trucks then newer trucks. That being said some believe that the baffles in the stock tube are not meant to restrict air flow but, to smooth the flow of air out. So when it enters the throttle body is it less turbulent and flows easier into the motor. Then there are the folks that say that changing just the intake without changing out the exhaust system is pointless. If you are letting air flow in easier but not out then gains will not be realized. I really don't know what the correct answer is. I had a drop in k&n in my silverado. Did I notice a difference? Maybe. It could have just been a mental thing though
    #12
  13. stchman

    stchman New Member

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    There are people that think those throttle body spacers do something besides make a whistle sound.

    I still don't see what that spinning the air equates to more HP and torque.
    #13
  14. Pikey

    Pikey Moderator

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    I live in Michigan near ford and gm headquarters. I have seen ford engineers use microsized balls or rubber bb's and high speed cameras to watch the flow of air thru intakes and engines. They use clear components for some things and cutaways for others so they can see thru them. It is pretty cool to watch. It makes me think that what ever they put on my truck stock is probably for a good reason. I mean, a straight less restrictive tube would be a lot cheaper for GM to manufacture, yet they build (or have them built) the tubes with baffles
    #14
  15. dpeter

    dpeter New Member

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    I would agree with Pikey. Engineers do things for a reason and not all of them for performance. Think a few moves ahead before you change stock components.
    #15
  16. Sierraowner5.3

    Sierraowner5.3 New Member

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    i have a drop in k&n filter in my stick air box. dont plan on doing a full CAI either. I really didnt even buy the filter for the power aspect of it, more so to have a long life air filter.

    Alex
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  17. stchman

    stchman New Member

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    Agreed, but a lot of what they do is to make the vehicle quieter. The engineers at Ford and GM do a fantastic job of getting the maximum power with the noise constraints placed on them.

    With that being said, if you don't mind a little more volume, you can achieve better performance with:

    free flowing exhaust
    free flowing intake

    Removing that water heater sized quiet muffler is a good start.
    #17
  18. Conlan Rose

    Conlan Rose Super Moderator

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    To be honest the 1996-1999 OBS truck had a fairly non restrictive air intake. The tube is about 3" and the filter is massive as you can see from my air box. No matter what you are still restricted by how much air can come through the intake in the fender that leads to the front of the truck. Mine is 3" wide and 4" tall at the opening, but the opening behind the grill is much smaller. Only about 2"x 3" in size.
    2011-06-14_12-06-30_908.jpg 2012-10-13_19-51-53_782.jpg 2012-05-13_15-20-51_178b.JPG
    #18
  19. SurrealOne

    SurrealOne Former Member

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    Unless you cut the bottom out of the airbox!
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  20. Conlan Rose

    Conlan Rose Super Moderator

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    Well of course, but then it doesn't really make it a "COLD" air intake since it will suck in hot air from the engine compartment.
    #20

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