I figured as much, but since you only mentioned "breathing" in the OP, I figured anything was game. I'd be curious to see someone post their findings from the so-called cold air intakes. Or the real cold air intakes, aka snorkels, from some of our recent Australian members.BMXPath wrote:Sorry, I am talking about the aftermarket intake kits that replace the pipe from the throttle body, and the entire air box.
I jsut got the Fram Air Hog - will advise after some miles.LittleStevie wrote:I'd stay away from that K&N stuff. I recently converted back to stock cellulose after using a K&N drop-in for about 10k miles. I don't remember where I saw it, but someone did some filtration efficiency tests where the K&N let a lot of dirt by. There's also the opportunity to screw your MAF sensor if you over-oil the filter.
K&N is known for high flow applications, especially racing. You might get a little more air flow, but at the expense of engine longevity and durability. Besides, the change in performance, if there was any, was not even perceivable. Not worth reducing your engine life, IMO.
The stock airbox is pretty large on the R51 Pathy, but I'm sure that a CAI would help. How much is the question. I'm not about to spend $200 and more for a measly 5 hp.
When you get your results of the track can you post pics of K&N cold air on your pathfinder...BMXPath wrote:Update...
Today I ordered the K&N FIPK cold air kit. K&N claims a 14.27 hp gain @ 5700 rpm at the rear wheels.
After alot of research I chose the K&N for a couple of reasons...
1. Of all the companies offering cold air kits, K&N was one of the few with specific results, including a dyno chart, for the 4.0 Nissan engine. I didnt want to spend 2 to 3 hundred bucks on something that claims,
"up to X# hp gain"... For that kinda money, you better have the specific results for my vehicle!
2. The claimed hp gain is on the higher end of all the ones I researched, so I hope I get something at least close to their claim.
K&N's test vehicle was an '05 Frontier. The same part number fits the Pathfinder and Xterra.
The place I ordered it from had it in stock, I am supposed to get it by friday.
I am going to the drag strip next wednesday with some friends. I will be back with my results. We shall see what kind of improvement I get.
BTW, my best 1/4 mile times have been a 15.30 @ 88.90 and a 15.31 @89.20. Stock engine with a K&N filter element.