Legal CAT replacement
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Senior User
Joined: Jun 1999
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Legal CAT replacement
Hey, I was wondering what situations are legal to replace the cat? I have a 88 F150 351W, its exhaust system is rusty and falling apart. I would like to have the whole system repalced with a high flow cat. its got over 105,000 miles on it. I heard once that you can have the cat replaced after 100,000miles. Is that true?
Thanks
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Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
Legal CAT replacement
Yes, if your system is in that kind of shape then you can replace the cat. Actually it can be replaced after like 70,000 miles. Or so many years, at least that's the last thing I read about 6 onths ago.
I have a high flow cat on my truck, and it has definitely made a difference in sound quality! Of course the flowmaster system I had built, and the headers only added to that sound quality.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
I have a high flow cat on my truck, and it has definitely made a difference in sound quality! Of course the flowmaster system I had built, and the headers only added to that sound quality.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
=======================================
1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
