yo,
Here is how;
K&N® Installation pics in an 89 5.8 Source: by SpringsBronco (Damon G) at SuperMotors.net
In the computer industry "YA" stands for "Yet Another..." so here's YA FIPK write up. I'm posting this even though it's similar to other write-ups (several of which I used for reference - special thanks to Andy351) to show another connection option. Besides, everyone wants their name on the Internet!
I bought my 89 XLT EB last March. It had a drop-in KnN that was so full of gunk it was nearly destroyed. Cleaned it all up and life was better. I'd been tempted by the cone filters for a while, though, so decided to do it. Ordered the KnN part number RF1012 for $50 from 4Filters.com (quick and free shipping!) and put it in Saturday. My biggest problem was finding a connector from the stock intake tubes to the filter. Tried 3" pvc and an exhaust pipe. Both were too large to fit inside the filter or intakes. 2 trips to Home Depot and 1 to Lowe's finally got me the "3-inch ProFlex Coupling" (part number 3005-33 at Home Depot if anyone cares). This baby attached directly to the filter and the intake tubes and seems to be pretty sturdy. Am a little worried about the connections so will be watching them and will update this How To if necessary. I also fabbed a little bracket to support the filter.
My other challenge was the metal tray the original air cleaner box was secured to. It also provides the support to the antifreeze overspill and the wiper fluid. I pulled the tray and cut off the portion where the stock cleaner sat and remounted the plastic fluid tank. Gives a lot more space for the air cleaner to breath from. Plus the Bronco's lighter without it, so I should be a big mileage increase, right?!
Once I outsmarted the tubing issue the install took about 10 minutes (except for cutting down the tray with a hacksaw, that took another 15 or so). The sound is wicked, though sometimes it sucks air like an asthmatic Darth Vader with a constant inhale. It seems a little more responsive to the throttle, too, but that could be wishful thinking. Don't know how much it helped but it certainly didn't hurt! I spent about $65 total, including the filter, so that was a great Saturday morning project.
I'd be curious if anyone who's done this has the exact info on the tubing they used between the stock intake tubes and the filter. My solution works for me but I'm curious where I could have found the tubes others have used. The outer diameter of the 3" exhaust was the same size as the other connections, so I couldn't get it to work. I couldn't find any other tubing that had an outer diamter of 3"
Steps:
1. Remove the stock air filter, air filter box, and intake tubing.
2. Check the clearance between the air filter box support tray and your new cone filter. If necessary, remove the filter tray. You can do this by removing 1 ***** that supports the wiper fluid/coolant tank, then removing 3 screws (2 from the body and 1 from the support arm). Cut the tray off the rest of the bracket with a hacksaw and replace the bracket and reattach the tank.
3. I used two 3" Proflex Couplers. I attached each to the cone filter, then to the intake tubes.
4. I used a metal strap to fab a short piece to support the filter. I drilled a hole through the lip at the edge of the fender and hung the support from a bolt. Now it's very secure. A cleaner look might be accomplished by fashioning a support underneath the filter, as several others on here have done.
5. Test drive and enjoy!
See Hot Link to his SM site for da pics:
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K&N® Installation in an 89 5.8
Source: by Andrew K (Andy351, das panzer, sloppy seconds, the magic carpet) at
http://www.supermotors.net/clubs/superford/vehicles/registry/2318/15449
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GL!