[OrangeBandit]

I'm new here, so please bear with me!

I have a '99 F250, Extended Cab, PSD, 2WD, that is my daily driver. I drive it around town (empty) in my business and tow a 36' 5th wheel toy box when traveling. Bought it new, and currently have 147,000 on the clock. Have had a Hypertech Programmer in it for nearly the whole time.

About a month ago, I cut out the muffler and straight piped it. Added a bit more zest and increased my mileage.

I am looking for a bit more zest and a bit more mileage again. My son has suggested the K&N Air Filter system. According to their web site, it would add 8+ horses. I do not drive it on dirt, unless the streets are being worked on, so I'm not concerned with the dirt pick up issues from off-roading. What should it do to my mpg?

Next question, I was looking for a slightly larger fuel capacity. Again, my son who is in the wrecking yard business, thinks that I could take the 36 gal tank that comes on the dually and put it in my truck. Will it replace my 29 gal tank and fit without some crazy modification?

Thanks in advance.

 

[1188]

Welcome to the site!! There are many different choices. The first thing I will recommend is a set of gauges, pyro, boost and transmission temp. On the air intake you could go with a afe stage 1 or 2, Tymar, or Fords Ais. If you search on those 3 there are more and Im sure more people will chime in with some more info. I have the afe stage 2 and am satisfied but its a lil over 400. It all depends on what your looking to get out of your motor. Jim

 

[Down South]

[ QUOTE ]

I am looking for a bit more zest and a bit more mileage again. My son has suggested the K&N Air Filter system. What should it do to my mpg?

[/ QUOTE ]

The K&N does't get great reviews here. If it were me I'd go with a Tymar setup, the Ford AIS or the AFE stage 2 with the PG7 media. I don't think you will see a MPG increase to amount to much from just changing out the OEM air box.

I don't have a clue about the fuel tank but it sounds like a great idea.

 

[Kanman]

I think general consensus on the K&N slip in filter summed up in one word. Leaks!

Check out the Ford AIS, and possibly the AFE Stage 2. If you decide on the AFE, be prepared for the addition of considerably more engine noise.

 

[kwazyca]

[ QUOTE ]
I think general consensus on the K&N slip in filter summed up in one word. Leaks!

Check out the Ford AIS, and possibly the AFE Stage 2. If you decide on the AFE, be prepared for the addition of considerably more engine noise.

[/ QUOTE ]

Kanman is right about the noise. Great filter though. If a bit expensive.

You might want to do a search on Tymar. Great filter kit for the money, although equally noisy.

Tom