catless exhaust

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crimm99

New Member

Feb 28, 2004

41

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0

Clinton, IA

May 31, 2004

#1

• May 31, 2004

• #1

Does anyone have a 99+ gt with the cats removed? I've only owned mine a few months and it had an x-pipe and the cats removed when I bought it. What kind of hp gains do you get without running the cats? Ive heard anywhere from 20-40, is that close?

 

streetstang03

unModerator

Dec 27, 2003

0

1

0

the dark side of the moon/home of the 1999, 2003,

May 31, 2004

#2

• May 31, 2004

• #2

its about 10 hp gain. i love my o/r xpipe

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

12

79

60

Dunedin, FL

May 31, 2004

#3

• May 31, 2004

• #3

Sounds like you may be growing tired of the sound, smell or both and are considering adding cats...? If you get a high-flow catted H or X (with single cats), the power loss would be minimal and your ears will love ya for it. Or just have high-flow aftermarket cats welded in. We loved the o/r H, flows and dumps on my wife's 01 for a couple months, then got tired of it, then hated it. We got to the point where everyone wanted to race (or thought we wanted to race) if we didn't crawl off the line at a stop light. And it was so loud, we couldn't race everybody...christ, you could here the thing 1/4 mile away!
Gone now is that exhaust system. In it's place - a custom, single cats H, flows and the tail pipe from my 02 (I got the full cat-back). It's still very aggressive sounding, but much more tolerable.

 

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stangluver02

New Member

Apr 23, 2003

79

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0

Going deaf from my exhaust

May 31, 2004

#4

• May 31, 2004

• #4

Its all personal preference. I have had my dr. gas for 4 months now and love the sound every time I drive it. As far as power gains from no cats Pauls automotive told me anywhere from 5-10 depending on the application.

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

12

79

60

Dunedin, FL

Jun 1, 2004

#5

• Jun 1, 2004

• #5

19 months til 40...I'm getting old...!

 

COBRA90GT

Mustang Master

Sep 22, 2001

6,654

0

87

HOCKEYTOWN ® , MI

Jun 1, 2004

#6

• Jun 1, 2004

• #6

twogts4us said:

... If you get a high-flow catted H or X (with single cats), the power loss would be minimal and your ears will love ya for it. Or just have high-flow aftermarket cats welded in...

Click to expand...

What he said. I love my Magnaflow catted X-pipe, not too loud, not too quiet - just right IMHO. Welding a set of Carsound brand catalytic converters might be more cost-effective than purchasing a new midpipe that has cats though, so you may want to consider that option.

Additionally, today's aftermarket catted X & H pipes will "flow" just fine (the power difference between "no cats Vs cats" is next to negligible, when comparing naturally aspirated engines).

 

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rob1

New Member

Mar 18, 2004

94

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Indiana

Jun 1, 2004

#7

• Jun 1, 2004

• #7

I'm getting ready to go to an X-pipe without cats. I currently have magnaflow catted and it is nice. I'm going without cats since I'm adding L/T headers. If I don't like it then I will get cats added in.

 

jrc_03_gt

New Member

Jan 1, 2004

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www.cardomain.com

Jun 1, 2004

#8

• Jun 1, 2004

• #8

without cats that is the only way to go. the car sounds so much better plus you gain top end and in higher rpm's.

 

rustang04

Banned

May 4, 2004

239

0

0

Jun 1, 2004

#9

• Jun 1, 2004

• #9

why does mine sound so raspy? does any one elses sound like crap?

 

streetstang03

unModerator

Dec 27, 2003

0

1

0

the dark side of the moon/home of the 1999, 2003,

Jun 1, 2004

#10

• Jun 1, 2004

• #10

rustang04 said:

why does mine sound so raspy? does any one elses sound like crap?

Click to expand...

1) you might have a leak
2) i have heard that ppl are unhappy w/ the way the BBK xpipe sounds noticed a lot of ppl say they sound bad. not for sure, just seems to be the impression i get

 

StngStr

Member

Jun 24, 2003

616

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17

48

Central Florida

Jun 1, 2004

#11

• Jun 1, 2004

• #11

no cats? don't be silly.

 

Jesus

Banned

May 13, 2003

267

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0

Woodland Hills, CA

homepage.mac.com

Jun 1, 2004

#12

• Jun 1, 2004

• #12

I am going to be adding cats to my setup and was wondering if any body has some recomondations for brand, and/or has a part number. I looked at the stuff on the magnaflow site but am unsure of which part# to get. Exhaust setup is in my sig. but in case you dont look down there I have a MAC prochamber and 2 chamber flows. Another reason I am going to do this (beside needing to pass emissions) is the smell is finally starting to bother me, and I am also intrigued about the fact that I might get some torque back be putting the cats on.

 

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fstylw03

New Member

May 3, 2004

21

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1

48

PA

Jun 2, 2004

#13

• Jun 2, 2004

• #13

rustang04 said:

why does mine sound so raspy? does any one elses sound like crap?

Click to expand...

I also had a flowmaster catback and a bbk o/r x and mine too sounded horrible between like 2,000-4,500 rpms. Sounded great when the car wasnt under a load though. I also think I lost some torque. However it did run a 13.29 @105.73 with those being the only mods done to the car. I finally decided that the tin can rattle was too much to take and put my stock h-pipe back on last night. Car sounds stock again I have heard that the bbk is what makes it sound like crap so I am probably going to go with an h-pipe this time and probably catted. The car wasnt to loud but it was way to tinny. And we all know that an h-pipe sounds good with flows.

 

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fstylw03

New Member

May 3, 2004

21

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1

48

PA

Jun 2, 2004

#14

• Jun 2, 2004

• #14

oh by the way this is on an 03 mach 1

 

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02_2VStang

New Member

Apr 11, 2004

73

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Cary, N.C.

Jun 2, 2004

#15

• Jun 2, 2004

• #15

streetstang03 said:

1) you might have a leak
2) i have heard that ppl are unhappy w/ the way the BBK xpipe sounds noticed a lot of ppl say they sound bad. not for sure, just seems to be the impression i get

Click to expand...

i love my bbk setup, sounds great, real loud, and screems when gettin on it