Pre-1997 Models

300 I-6 Header

Old Feb 14, 2000 | 05:21 PM
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Post 300 I-6 Header

Does anyone have this header on a fuel injected engine? I am thinking about getting one, but am skeptical about it. I am wondering what I would do with my oxygen sensor. I know I could easily drill and tap a hole for it in the header, but would the different flow rate cause different readings, and possibly just screw up the computer more? If there is more air rushing by, could the computer be reading lean, and try to richen the mixture. This would probably do more harm than good I would think. Any advice would be great. Thanks


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Rob
89 F150 4X4
300 I-6, 5 spd
For Off Road Driving

 
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Old Feb 14, 2000 | 06:23 PM
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You should already have a stock header setup on this particular year and engine. Comes down into two 2 1/2 inch collectors.
 
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Old Feb 14, 2000 | 07:01 PM
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Stock header?
This means that using something from clifford would be a waste of money? Thats always good to know. How do you know this? I believe you on it, just I am always looking for places to get info on my truck and engine. I am trying to squeeze everything out of it I can, and still keep it emissions legal. I still have 14 years before it won't have to go through anymore, and the truck will probably be up to 500,000 miles by then. Hmmm, half way to a million.


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Rob
89 F150 4X4
300 I-6, 5 spd
For Off Road Driving

 
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Old Feb 14, 2000 | 08:18 PM
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I had a '92 and wife had a '96, that's how I know. I believe Ford started building these engines with a header setup around the '80 model year, not for sure. The factory header setup on my two pickups was very similar to Clifford's. I would get an FIPK and cat-back and leave things at that. Best prices I've found are at http://www.gocoastal.com they handle Gibson and K&N. Cat-back from them is $279 and FIPK is $122.13.
 
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Old Feb 19, 2000 | 08:46 AM
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I have a Flowmaster cat-back and the K&N FIPK. It increased hp and mileage

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1989 F-150 XLT LARIAT 4x4 4.9L I6 5 speed manual tranny 3.55 gears K&N FIPK 3" Flowmaster.

 
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