Air Filter Q.
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Air Filter Q.
OK so I see alot of post about adding K&N filters to the truck. What filter do you guys recommend for a 2008 dodge 1500 5.7L 4x4 and by swithing out the factory with say a K&N how much of a difference is there when it comes to gas and Horse power? Also should I change out the airfilter setup (Ex.remove the box and hose that goes to the engine and replace all of it with the K&N setup). Thanks for helping a newbie
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Joined: Jul 2007
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From: South Georgia/East Florida
RE: Air Filter Q.
Asking which filter and which air intake is like asking your favorite color. Everybody is going to have a different answer.
I have a K&N CAI in my truck, model 77 and a K&N drop in for my Grand Cherokee Overland. The Overland has the 4.7 H.O. in it and the High Output's upgraded intake is about as close to a CAI as you can get factory. I've been using K&N drop ins since I got my first vehicle almost 25 years ago. My old man worked at the track as a machanic on weekends and my uncle retired after 38 years as a mechanic and they swore by them. I've never had another brand and never had a reason to switch.
A lot of guys are going to the filters that never need re-oiling and I guess that's ok, but personally I have no problem taking an hour every other year or so to re-oil mine.
Name brand after-market air filters consistently show better flow than a stock paper filters, especially when dirty. That said, you are not going to see much of a difference (if any) sitting behind the wheel. We are talking maybe a 2-3 HP gain for a drop in and not much more than 10 from a CAI.
The real benefit of a CAI is it gives other after market mods the extra air necessary for them to work properly. A CAI makes a cat-back exhaust perform more efficiently. Add a tuner and you get better gains, add headers and even more so. I've personally seen where the gains of these mods give better gains in series than the combined gains that they'd give individually.
If you are going to get a CAI, I don't think the brand is real important, I just personally think you need one that replaces everything back to the TB. That box that sits on top is a real air bottleneck, more so than the airbox that your filter sits in. It's basically a resonator and really cuts the air flow. Also, stay away from the ones with the nice pretty chrome tube, like my series 77. The metal tube really echoes the sound of the TB and EGR valve, which can be a little annoying. Go for the plastic tube, in a K&N I think it's the 63 series, it doesn't echo those sounds like mine does.
A CAI combined with a good flowing cat-back exhaust and a good tuner is a really nice combo to shoot for and will not only give you a performance boost you can feel, but should net you a nice little mpg gain, if you can stay off the throttle!!!
I have a K&N CAI in my truck, model 77 and a K&N drop in for my Grand Cherokee Overland. The Overland has the 4.7 H.O. in it and the High Output's upgraded intake is about as close to a CAI as you can get factory. I've been using K&N drop ins since I got my first vehicle almost 25 years ago. My old man worked at the track as a machanic on weekends and my uncle retired after 38 years as a mechanic and they swore by them. I've never had another brand and never had a reason to switch.
A lot of guys are going to the filters that never need re-oiling and I guess that's ok, but personally I have no problem taking an hour every other year or so to re-oil mine.
Name brand after-market air filters consistently show better flow than a stock paper filters, especially when dirty. That said, you are not going to see much of a difference (if any) sitting behind the wheel. We are talking maybe a 2-3 HP gain for a drop in and not much more than 10 from a CAI.
The real benefit of a CAI is it gives other after market mods the extra air necessary for them to work properly. A CAI makes a cat-back exhaust perform more efficiently. Add a tuner and you get better gains, add headers and even more so. I've personally seen where the gains of these mods give better gains in series than the combined gains that they'd give individually.
If you are going to get a CAI, I don't think the brand is real important, I just personally think you need one that replaces everything back to the TB. That box that sits on top is a real air bottleneck, more so than the airbox that your filter sits in. It's basically a resonator and really cuts the air flow. Also, stay away from the ones with the nice pretty chrome tube, like my series 77. The metal tube really echoes the sound of the TB and EGR valve, which can be a little annoying. Go for the plastic tube, in a K&N I think it's the 63 series, it doesn't echo those sounds like mine does.
A CAI combined with a good flowing cat-back exhaust and a good tuner is a really nice combo to shoot for and will not only give you a performance boost you can feel, but should net you a nice little mpg gain, if you can stay off the throttle!!!
