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  #1  
Old 02-23-2007, 09:24 PM
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Join Date: Feb 2007
Location: Elk Township, NJ
Vehicle: 1997 Ford F-150
Posts: 20
Pre-Cats ?

My 1997 4.6 has four cats like ford has been doing. What is up with the little pre-cats though? Are they like resonators or do they actually do something for emissions. My SISO flowmaster 40 isnt loud enough. Dont have money for duals and i want to work with what i have. Has anyone messed with the pre-cats? I dont want to touch the big *** cats but i really dont see a point to the little ones if there are two big ones. Also would straight pipes sound crappy? If anyone has done anything like this could you please let me know? Thanks

Randy
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1997 Ford F-150 4.6 v8 2WD
Flowmaster 40 Series in place of stock.
Sold the truck of my dreams (86 F-150 Lifted) and regret it everyday.

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  #2  
Old 02-23-2007, 09:43 PM
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Join Date: Feb 2007
Location: Elk Township, NJ
Vehicle: 1997 Ford F-150
Posts: 20
also anyone with a turbo muffler in their cat-back? Summit Racing system only $150 SUM-684655. Will this be louder than my flowmaster?
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1997 Ford F-150 4.6 v8 2WD
Flowmaster 40 Series in place of stock.
Sold the truck of my dreams (86 F-150 Lifted) and regret it everyday.

Gallery
http://www.f150online.com/galleries/....cfm?gnum=9263
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  #3  
Old 02-23-2007, 10:16 PM
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Join Date: Jul 2006
Location: Farmington, MO
Vehicle: 1998 Ford F150
Posts: 6,280
I have long tube headers, 2 high flow cats, and an X pipe with spintech mufflers turned down, about $1500 in it, but from the headers back, only about $250.
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  #4  
Old 02-23-2007, 10:47 PM
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Join Date: Feb 2007
Location: Elk Township, NJ
Vehicle: 1997 Ford F-150
Posts: 20
Hey thanks for the reply. First i want to comment on your truck i think its bad *** man. and 250 isnt that bad for everything that you have after the headers. How much did your high flow cats cost and where did you get them? Ive read that they make a huge difference but never really looked into them. I always thought they were really expensive.
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1997 Ford F-150 4.6 v8 2WD
Flowmaster 40 Series in place of stock.
Sold the truck of my dreams (86 F-150 Lifted) and regret it everyday.

Gallery
http://www.f150online.com/galleries/....cfm?gnum=9263
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  #5  
Old 02-23-2007, 10:54 PM
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Join Date: Aug 2005
Location: DFW
Vehicle: 2003 F-150
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yes they have emission control in them, no the truck wont know they are gone, and yes it will be louder without them.

see meh sig, i know what im talking about ;)
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  #6  
Old 02-23-2007, 10:58 PM
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Join Date: Jul 2006
Location: Farmington, MO
Vehicle: 1998 Ford F150
Posts: 6,280
I got my cats off ebay, a little over 100 shipped for both, and i did the rest my self. It will burn cleaner, and run better with high flows.
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  #7  
Old 02-24-2007, 12:16 AM
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Join Date: Aug 2006
Location: Michigan
Vehicle: 2003 Ford F-150
Posts: 169
does anyone know if the local muffler shop would weld on highflow cats? I live in Michigan and I know they won't touch it if you want to take them off all together. The price for the cats at troyer is that just for one? So I would have to order two of them or is it a pair?

Last edited by Deskinsd; 02-24-2007 at 12:24 AM.
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  #8  
Old 02-24-2007, 02:03 AM
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Join Date: Mar 2006
Vehicle: 2001 Ford F150
Posts: 2,599
most muffler shops will not touch the cats unless they need replaced due to corrosion or something like that and will only install stock OEM cats for vehicles & not aftermarket parts, if you find a place thats out where they dont have emissions you might get lucky & they might install the highflows for you :thumbsup:
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  #9  
Old 02-24-2007, 10:16 AM
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Join Date: Oct 2006
Location: Canada
Vehicle: 2009 Ford F-150
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http://exhaustsoundclips.com This site as sound clips of diff systems and a dual straight pipe on a 04 5.4. Check it out.
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  #10  
Old 02-24-2007, 10:36 AM
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Join Date: Jul 2006
Location: Farmington, MO
Vehicle: 1998 Ford F150
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I know a guy at a local shop that does that kind of stuff. You just have to look around.
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Old 02-24-2007, 10:36 AM


 
 
 
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