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hi flow cat and gas mileage

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Old 10-10-2006, 08:15 PM
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Default hi flow cat and gas mileage

Does a hi flow cat cause poor mpg?
Old 10-10-2006, 08:17 PM
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Default Re: hi flow cat and gas mileage (bma1818)

I didnt notice a drop.
Old 10-10-2006, 08:20 PM
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Default Re: hi flow cat and gas mileage (cambopheonix56)

on a normal tank of gas I m getting about 260 miles before i need to fill up
Old 10-10-2006, 08:22 PM
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These guys claim their high flo cat improves gas mileage. http://www.rpmoutlet.com/powercat.htm
Mine isn't 4" in the middle its 2.25" inlet 2.5" outlet.
I got it off ebay for 28 bucks.
It along with my full catback seems to have the same gas mileage on the car.
Old 10-10-2006, 08:23 PM
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i have a generic hi flow cat, no change in MPG
Old 10-10-2006, 08:26 PM
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Default Re: hi flow cat and gas mileage (bma1818)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bma1818 &raquo;</TD></TR><TR><TD CLASS="quote">on a normal tank of gas I m getting about 260 miles before i need to fill up</TD></TR></TABLE>


What is your mpg. That is a more important question. All city, highway, both, lots of vtec, no vtec? Give us more info.
Old 10-10-2006, 08:35 PM
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Default Re: hi flow cat and gas mileage (cambopheonix56)

lots of city driving and not using the vtec. Ever since I put a hi flow cat on I had problems with my check engine light coming on and saying that I have a bad o2 sensor. the code is (p0135). So I replaced the o2 sensor that it told me and tried to clear the code but it came right back on. I need some help or advice.
Old 10-10-2006, 08:48 PM
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Default Re: hi flow cat and gas mileage (bma1818)

Yea its not the o2 sensor. Conver to obd1 to get rid of that code, or get a obd2 friendly cat. Gas milage is fine for city driving.
Old 10-10-2006, 10:31 PM
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nope it still all depend on the driver at for me anyways
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