How often should they be changed? What is a good air filter that I can put in the stock air box without any modifications? Does an aftermarket air filter perform any better than the stock one?
IF your stock filter is that power core, leave it alone.The K&N has been known to let dirt by. If you have that power core it is just fine.
__________________ Four stroke diesel S.S.B.B. Suck Squeez Bang Blow
06 LBZ with 5 inch magnaflow exhaust,Bd exhaust manifold, Bully dog outlook, Egr blocker, Firestone air bag system,Custom sound system, dual fuel filters,leveling kit, B&M deep tranny pan,TTS lift pump,Turbo Resonator plugged,Cooper ST 265/75R16, Bully nerf bars and B&W guardian headache rack sprayed with reflex bed liner, B&W turn over ball,B&W Tow&Stow, transgo jr, efi live, tranny filled with transynd Omaha Truck and Trailer offering Woodworth custom build trailers. Now a factory authorized Whelen dealer
My iron is yellow
that is the stock air filter in 2006 and newer d-max's. They call it a power core cause of its round shape.
__________________ Four stroke diesel S.S.B.B. Suck Squeez Bang Blow
06 LBZ with 5 inch magnaflow exhaust,Bd exhaust manifold, Bully dog outlook, Egr blocker, Firestone air bag system,Custom sound system, dual fuel filters,leveling kit, B&M deep tranny pan,TTS lift pump,Turbo Resonator plugged,Cooper ST 265/75R16, Bully nerf bars and B&W guardian headache rack sprayed with reflex bed liner, B&W turn over ball,B&W Tow&Stow, transgo jr, efi live, tranny filled with transynd Omaha Truck and Trailer offering Woodworth custom build trailers. Now a factory authorized Whelen dealer
My iron is yellow
Afe (advanced Flow Engineering) Has More Rag Stock And Will Not Allow Oil To Blow Past To Map Sensor
I'd have to say the K&N is much better than the aFe, let's just say I've seen the test first hand. K&N's don't let oil blow past anything. That was a company (aFe) trying to sale filters, they leaked that info. They were actually forced to retract that statement and pull it from there site! I don't deal with people that do business that way.......
The factory filters are restrictive regardless of which filter it is, the 05 1/2' and newer LBZ's slightly less however. K&N has a drop in that works excellent!
__________________ SpeedRacer88
2006 LT Crew Cab Short Bed LBZ, Edge Juice w/Attitude, K&N Intake w/dry charger, Magnaflow Catback, Leveling Kit, 285/75 Falken's.
1973 RS/Z28 Camaro 433ci BB http://www.cardomain.com/ride/2650821
How often should they be changed? What is a good air filter that I can put in the stock air box without any modifications? Does an aftermarket air filter perform any better than the stock one?
1. almost never if you are using stock. In the absense of a desire to listen, use the filter minder. It doesn't lie.
2. the 1618C stock element
3. No
but there are many people who just need to waste hard earned $. It is funny how some must make their own mistakes, inevitably do, then cover up the placebo derived conclusion with misleading public conclusions.
Killerbee, I would have to disagree with you. How much does a stock air filter cost?$40-50 bucks... how many times can you reuse your stock filter? what's going to flow better? Do the math. My hard earned money is going to be spent on the aftermarket filter that lasts millions of miles and flows much better than stock.
__________________ 2006 silverado CC silver birch s s&b intake and amsoil oil. ppe economy tuner more to come...
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Drop in air filters 
K&N's don't let oil blow past anything. That was a company (aFe) trying to sale filters, they leaked that info. They were actually forced to retract that statement and pull it from there site! I don't deal with people that do business that way....... 
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