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Old 06-29-2012, 01:36 PM   #1
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Cats mpg?

I've heard people say removing cats decrease ur mpg?? But I, and other people say it increases. Which is it?
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Old 06-29-2012, 01:39 PM   #2
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Id say increase because it increases flow
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Old 06-30-2012, 10:44 AM   #3
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Yea that's what I've always thought
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Old 06-30-2012, 11:08 AM   #4
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Yea that's what I've always thought
Post a pic of your car I think we might have twins hah
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Old 06-30-2012, 11:38 AM   #5
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In my 96gt with clogged cats I saw a jump of 3 mpg highway and 2 mpg city after swapping to an offroad H. It was a nice surprise.
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Old 06-30-2012, 02:00 PM   #6
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Originally Posted by 2000_gt

Post a pic of your car I think we might have twins hah
Lol ur right!
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Old 06-30-2012, 02:03 PM   #7
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Hey I took my mufflers off my mach 1 and it started bogging because of back pressure if I was to take my cats off and put cherry bombs on would that be enough back pressure?
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Old 06-30-2012, 03:12 PM   #8
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Lol ur right!


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Pretty close. My hood scoop is being painted black
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Old 06-30-2012, 08:13 PM   #9
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Quote:
Originally Posted by Doe_Rae_mi
I've heard people say removing cats decrease ur mpg?? But I, and other people say it increases. Which is it?
Increase means custom tuning, plain and simle

---------- Post added at 09:12 PM ---------- Previous post was at 09:08 PM ----------

Quote:
Originally Posted by Doe_Rae_mi
I've heard people say removing cats decrease ur mpg?? But I, and other people say it increases. Which is it?
No cats is illegal in most states except race only; that means no street. I keep mine legal.

---------- Post added at 09:13 PM ---------- Previous post was at 09:12 PM ----------

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Originally Posted by DaBluedude
In my 96gt with clogged cats I saw a jump of 3 mpg highway and 2 mpg city after swapping to an offroad H. It was a nice surprise.
A pure 96 GT has 6 cats. I upgraded, to BBK and dropped 4 cats. Come clear.
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Old 06-30-2012, 09:41 PM   #10
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Quote:
Originally Posted by LAS97GT

Increase means custom tuning, plain and simle

---------- Post added at 09:12 PM ---------- Previous post was at 09:08 PM ----------



No cats is illegal in most states except race only; that means no street. I keep mine legal.

---------- Post added at 09:13 PM ---------- Previous post was at 09:12 PM ----------



A pure 96 GT has 6 cats. I upgraded, to BBK and dropped 4 cats. Come clear.
My state doesn't have emission checks
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Old 06-30-2012, 10:49 PM   #11
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Originally Posted by Doe_Rae_mi

My state doesn't have emission checks
Yeah my state doesn't either and I got the prochamber and i can drive next to a cop and not get pulled over and be loud when I want to mash the pedal, it gives the car a more deep rumble sound and it's still loud and turns heads but without being stupid loud lol
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Old 07-01-2012, 12:00 AM   #12
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Quote:
Originally Posted by LAS97GT



A pure 96 GT has 6 cats. I upgraded, to BBK and dropped 4 cats. Come clear.
I know. I got rid of all of them. It sounded great and It definitely picked up some low end torque and mileage. Ill be doing my mach 1 sooner or later.
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Old 08-19-2012, 09:16 PM   #13
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Yeah my state doesn't either and I got the prochamber and i can drive next to a cop and not get pulled over and be loud when I want to mash the pedal, it gives the car a more deep rumble sound and it's still loud and turns heads but without being stupid loud lol
Do you have just the stock gt mufflers with the pro chamber? Or do you also have different mufflers?
I was wanting to get pro chamber and new mufflers and wanna do the pro chamber first but not sure if it will be loud enough
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Old 08-19-2012, 10:47 PM   #14
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Wife's auto gt gets 18 city 22 hwy with intake/offroad h/borla catback. I don't complain about that mileage.
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