I wanted a higher-performance Air Induction system on my 2001 2WD Cherokee Sport as soon as I got it, and bought a Turbo City Free Flow Filter system as my first mod.
It worked well, gave me a throatier intake sound when I needed to step on the gas and generally improved performance somewhat.
But the air intake got hot, and I knew gulping hot air into the engine was not a good thing.
So when I had the chance to evaluate K&N's new 4.0l FIPK, I jumped on it as soon as possible.
The Box came tonight, I installed it with little trouble, and it's up and running fine.
The kit includes K&N's Free Flow Cone Filter, a heavy plastic "Ram Tube" which attaches to the throttle body with a big rubber fitting, steel fitting bands, screws, washers, nuts, and a heavy metal heat shield seperating the air intake filter from the rest of the engine like a "wall", and a certification decal listing the system as "emissions-approved". Also included was a K&N Filter Cleaner and Conditioner pack to maintain the system.
Documentation was first rate and easy to understand, all the parts looked first class down to the nylon-insert lock-nuts to hold the thing together.
Installation was straight forward: Take off the old air box and disconnect the crankcase breather tube. Hand-fit the outer insulation to the edges of the heat shield. Bolt an attaching bracket to the shield, bolt the lower edges of the shield into the engine compartment and tighten it all down. Fit the rubber Throttle Body onto the intake..clamp it into place...and lower the ram tube onto the top of the rubber intake fitting and tighten it down. Attach filter element to end of tube neatly nestled behind the heat shield, attach the crankcase breather tube to the intake side-fitting and carefully lower the hood.
It all fit fine, and the engine started right up..but without the "throaty" intake of the Turbo City Tube.
My Cherokee seemed a little more responsive, and I 'll enjoy tracking the performance and mileage over the next few weeks. I have no actual gas mileage or track times to compare real world performance at this time.
From my initial installation, It looks like a first-class system and installed without any major problems. It'll be interesting to see how the plastic ram tube holds up in the heat of the engine on top of the heat over the Summer. I'd be concerned about the possibly of the plastic tube " unwelding" at the molding points after prolonged exposure.
Wonder what a new header and free flow exhaust would do to my Cherokee now!