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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old Dec 30, 2012 | 07:16 PM
  #1  
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bakos
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Cat Hunt

When I honk the horn - truck go's into reverse ( just kidding )

97 f250 7.5 - all new exhaust - but used old cat. I want to put a hi-flow on just to make sure I have done all I can and not wondering about it

Question is - could someone recommend exactly what cat I should use? 3" system with air tube

I have looked and read everything I can and I can't settle on one - my brain is spent
Mike
 
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Old Dec 30, 2012 | 07:48 PM
  #2  
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Hutch17
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You dont need the air injection with Hight flow cats. I used a Thunderbolt High flow when I re did my exhaust. I have a 5.8 so I dont know if it would work or not. I got mine off of ebay and payed 50 bucks or so
 
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Old Dec 30, 2012 | 11:21 PM
  #3  
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bakos
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Thank you
I'll check out thunderbolt. I do want to use the air tube, seems how it costed me an extra fortune to maintain all that air junk
 
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Old Dec 31, 2012 | 05:37 AM
  #4  
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Hutch17
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Well I've heard that hooking up the air injection will actually prematurely kill you cat, so to speak.
 
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Old Jan 1, 2013 | 03:12 PM
  #5  
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swampthing
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From: mt. pleasant pa
i am in the same boat f250hd 7.5 8600gvw. living in the pa salt belt my exhaust has rotted away. got to keep my emmisions. i have posted questions for help on here with not much response. this is what i found out. using a high flow usally rated for 6000 gvw is great till you start towing or hauling heavy loads through mountains the cat heats up destroying inside. i was looking at one from flowmonster rated to 10000gvw for 145.00 free shipping. cant find no feedback on it for quality or durability. hope this helps
 
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