Drippin
Dripping Springs, TX
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Joined: 08/09/2005
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BurbMan wrote:
Look at the K&N "issue", perfect example. Some folks like DavidP will use it, like it, and see good benefits from it. Based on his truck and how he uses it and where he drives it, he is seeing icreased power without detrimental effects. Some folks will see no difference between K&N and stock...
I've got to agree with this. On our 2001 6.0L Chevy I added the K&N intake and filter. Frankly the only thing I saw was an increase in noise. Never any notable increase in power. I also looked hard at a number of aftermarket exhaust systems including headders and cat back systems. IMHO none of the systems would improve low to mid range torque which is where that motor needed help when towing.
In the end in order to get more power I got a new truck. Thanks to Cummins 6.7 towing in the hills is no longer an issue.
A man, his wife, their son, Cody the Goldendoodle and Sadie the Shepherd.
2008 Laredo 284BHS, 2007 Dodge Ram 2500 Quad Cab 4X4 6.7CTD, Equal-i-zer, P3, Subaru RG4300iS
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JJBIRISH
Butler, PA, USA
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Joined: 10/06/2002
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Thousands of miles of cross-country motorcycle racing, and you can’t win if you can’t finish…
Clean air is far more important than more air… a larger filtering surface will provide both clean air and more air, but more air does nothing by itself…
I hope no one thinks independent testing used in marketing isn’t bias…
Love my mass produced, entry level, built by Lazy American Workers, Hornet
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califRVers
Santa Rosa, California
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Joined: 10/08/2009
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DavidP wrote: I’m not trained or certified in any automotive capacity. I’m a hobbyist that likes tinkering with my vehicles or any engine for that matter.
If you would like a comment with real world “absolute certainty”, gains are only determined on a dyno. In the real world its at the rear wheels on the road. This is where my results are based. My truck is now used only as a TV and I don’t make a habit of smoking the tires and have only done it a few times (not my bag) but it does bring a grin to my face. With VDC off, prior to the installation with 8k on the ODO I was able to get moderate break loose spinning from both rear wheels out of the hole and IMO good strong towing power in the mountains. After the installation of my K&N CAI and Borla Stainless Cat-Back exhaust I can spin the rear tires (Both tires are stock BFG AT KO’s) into cloud of smoke if I want to. The out of the hole throttle response and power delivery is in your face, instant on, and not comparable to stock. It truly let the beast out. In fact I just replaced my KO’s after 60K and gave em a nice spin prior to getting the new ones installed. Nothing like the sound of a big V8 making power! The power is night and day, especially in the mid to upper RPM range. But more important for a TV I have enjoyed much more noticeable power in the mountains where it counts. That’s about as “certain” as one can get.
Those that have done this modification with quality performance parts know what gains they received, and usually it is very substantial. Seems many in this thread knock the idea of a good aftermarket exhaust and intake with no first hand experience in seeing the difference it can make. A high-end CAI and Exhaust will give you on average 20-25 more HP....that is substantial. A quality Cat-Back will also give you a nice deep rich exhaust note. Not too loud but just right. I personally am not into loud but do like the sound of performance.
Now, Can “anyone comment further with absolute certainty”? 
Well we installed a Flowmaster Super 40 Series (Delta Flow Technology) and replaced our stock filter with a K&N Air Filter and WOW.. we tried it out today with and without our trailer, and with our 31'9" Outback with a dry weight of 6500LB probably more like 6900LB now, it was a substantial difference in power, definitely somewhere in the 20-25HP range, our F150 responded immediately and with force!! Now we know by experience that these modifications have given us a positive gain in performance. The bonus is our truck sounds great too!!
Tim and Julie
Our Blog | Our Outback
2010 Outback 260FL 31'9" GVWR 7800 - Atwood 3500 - Eaz Lift Elite - 2 Interstate 6V
2006 F150 4x2 Supercrew Lariat 5.4L Triton V8 3:55 LS 139" WB 20,000K Miles
Prodigy - Flowmaster - K&N Filter
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kfriceman
Ferndale, WA
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Joined: 02/12/2005
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Installed K&N filters in my Mercedes and VW within 6 months I had to replace MAF sensors in both vehicles; needless to say both K&N filters are in a land fill somewhere.
Glad to hear these filters work for others but for me it only cost me more money; been using the paper filters ever since and no problems to date.
-Kevin
2008 Tango 299BHS * 2007 GMC Yukon Denali
Trip count 2009: 7
Nights camped 2009: 33
The Rice Paddy
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Fisherguy
BC Canada
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Joined: 07/31/2003
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I would never put a K&N on my truck. I've read too many stories, they flow great but don't filter too much at all, matter of fact people who use them are finding dust on the filtered side of the inlet to the trurbo on Dodge trucks, I put an S&B CAI on my truck.
For the exhaust I got rid of the stocker and bout a 40" Nelson muffer from my local Cummins store for a whole $67. It's 4" straight through, not much loder at idle and not obnoxiously loud like a lot of the after market "performance" mufflers.
06 Dodge Ram 3500 Cummins 6 spd std with a few mods.
2007 Komfort 274S
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RV_haulr
San Bernardino County, Ca.
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Joined: 08/08/2009
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I will not put K&N's on any of my engines. I value the longevity of my equipment. The oil used on these filters is hard on your MAF sensor. And the dirt that gets by these filters is hard on rings and valves. I had K&N's on my motorcycle along with a very agressive exhaust system. I took the filters off. My bike is carburetted. What I noticed is that I did not have to re-jet when I switched to a stock filter. If they were flowing as much air as K&N claims I would need to re-jet. A good filter is going to collect dirt, that is it's job. IMHO K&N's advertizing is a load. ...RVH
27' Komfort 27T. 2005 Nissan Titan Crew Cab.
Just me and the wife.
RETIRED : Operating/Stationary Engineer
IUOE Local 501 Los Angeles,Ca.
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