So I am thinking of buying the cold air intake this should be around $275 to $300 for my 2000 F-150.
It is the 5.4 V8 and I also have a dumped magnaflow on it. Would it increase the sound of my magnaflow when I hit the gas if I put this intake on? I have a K&N filter and it has done great on my truck.I also go down alot of gravel roads and collect alot of dust.
If you do an online search for “air filter test” there is a lot of very good information. IMHO, the CAI units are NOT WORTH THE $$ and won't change the tone of youe exhaust! Unless you are talking about a system that was specifically designed for a specific application there are very little hp/tq gains actually achieved in a street use vehicle and there are very few docs that these mfg’s can produce that actually show an increase in hp/tq in the power-band range of a relatively stock street vehicle.
I would avoid oil impregnated filters. While they have their purpose in off-road applications, Ford/GM/Dodge all have “watch-out” bulletins where the oil has contaminated intake sensors- they even have a training video for the tech's on this (flatratetech.com) .
If you look at the flow data, WIX HP filters flow 98+% of K&N and have a much smoother flow post filter plus excellent filtering, for a fraction of the price! The OE’s have an excellent air intake system the only issue that really exists is the plastic intake tube with it’s noise canceling design- that does reduce the intake efficiency a little but makes it very quiet!. You can use a WIX OEM HP replacement filter in the OEM plastic manifold box and either remove the plastic tube and replace it with a piece of pipe/hose, etc or remove the tube completely and replace the tube by building an air ram type intake into the air box manifold (where the pipe use to attach)- make sure ti terminates above the fan shroud to avoid water intake or fan induced pulsations.
DO NOT BUY THE K&N. Go to the summit racing website and find the summit racing brand C.A.I. It is made by K&N and is about $75.00 cheaper! I just bought it and took it out of the package and everything says K&N on it! go figure. It is part # SUM-F1140