hi flow cats

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10-21-2008, 11:17 PM

#11

Chubstang

5th Gear Member

Join Date: May 2004

Location: NH

Posts: 2,236

I would seriously just get a new mid pipe. After buying the cats and having a shop weld them in you might as well just get a new one.

10-22-2008, 08:04 AM

#12

1998 GT

2nd Gear Member

Thread Starter

Join Date: Jun 2008

Location: Illinois

Posts: 286

alright thanks guys

10-24-2008, 05:47 PM

#13

Lowtryx

2nd Gear Member

Join Date: Aug 2007

Location: Canada

Posts: 175

Quote:

Originally Posted by 1998 GT

i want an o/r midpipe but my parents wont let me cuz they think ill get caught and we dont even have frickin emissions testing

If your state has no Emissions laws you only have to worry about noise Violations.. And if you were going to worry about those, why did you buy a Mustang?

O/R pipes are cheap, compared to High Flows. Although if you plan to get Long Tubes in the near future, you need to select the right type of Mid Pipe to accompany them (In most cases).

10-24-2008, 06:41 PM

#14

NoGo95GT

4th Gear Member

Join Date: Aug 2007

Location: Texas

Posts: 1,788

I've got the two Magnaflow cats welded on to my BBK H-Pipe. Funny thing, at idle, it sounds just as loud as my off-road X-pipe I had. Plus, unlike off-road pipes, you retain some of your low-end torque.

10-24-2008, 10:18 PM

#15

Chubstang

5th Gear Member

Join Date: May 2004

Location: NH

Posts: 2,236

Quote:

Originally Posted by Lowtryx

If your state has no Emissions laws you only have to worry about noise Violations.. And if you were going to worry about those, why did you buy a Mustang?

It is still a federal offense to remove those cats, doesn't matter what state. Chances that you get caught for that are slim but you will get effed in the a if you do.

10-24-2008, 11:15 PM

#16

Stone629

6th Gear Member

Join Date: Feb 2007

Location: North Carolina

Posts: 11,302

Quote:

Originally Posted by Lowtryx

You won't notice a HUGE difference in noise, but the flow will definitely improve. They'll sound about as close to straight pipes as you can get them.
Might also depend on the brand of HFC you purchase.
Youtube?

You've never removed cats before have you? Removing the cats is what makes it loud as hell, regardless of pipe diameter. Also, longtubes DO NOT make your car louder!! If you think it does then you've obiviously never had them. The cat-back affects volume as does the cats. The cats affect the actual volume more than anything. Trust me, I've had two GTs, two Machs, a GTO, and a Z28. They all were experimented on.

10-24-2008, 11:17 PM

#17

Stone629

6th Gear Member

Join Date: Feb 2007

Location: North Carolina

Posts: 11,302

+1 on a new mid-pipe though, the stock ones flow like shat, especially after you remove cats, weld in pipe, etc.

10-25-2008, 10:12 AM

#18

mustangman02232

6th Gear Member

Join Date: Dec 2004

Location: Ludlow, Mass

Posts: 15,864

how much do your parents know about cars

"uhhh ya dad its got cats

", or take 2 stock cats and punch the interior of them out and leave them hollow

10-25-2008, 12:04 PM

#19

Chubstang

5th Gear Member

Join Date: May 2004

Location: NH

Posts: 2,236

Quote:

Originally Posted by Stone629

He was responding to the original post about replacing the stock cats with high flow cats, not removing them completely.

10-26-2008, 03:16 PM

#20

Lowtryx

2nd Gear Member

Join Date: Aug 2007

Location: Canada

Posts: 175

Quote:

Originally Posted by mustangman5089

He was responding to the original post about replacing the stock cats with high flow cats, not removing them completely.

Correct..

In answer to your question, yes I have removed Cats (Goes with the territory of being an Apprenticing Mechanic.. I like to play around and see what's what.)
As my Sig states, I'm currently running HF Cats, and I also have run without any cats.
The sound difference between no cats on my NPI and High Flows has been too close to call, really. For the possibility of an impending ticket for No Cats, High Flows are the way to go.