• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

guys long tube set up pass the sniffer?

  • Thread starter Thread starter ADRENLN
  • Start date Start date May 22, 2004

ADRENLN

Active Member
Apr 16, 2003
2,342
3
49
NJ
May 22, 2004
#1
  • May 22, 2004
  • #1
if you have cats. im just wondering because i have some long tubes on the way, and dont want to cancell the order. however, i was just thinking that in my state they print right on the inspection sticker the type of vehicle and other info. this means even if i dont go to regular inspection, i still really have to pass the sniffer. even if i go to a little gas station that does inspection and want to pay them for a sticker!

do you guys pass the sniffer if your catted?
 

ADRENLN

Active Member
Apr 16, 2003
2,342
3
49
NJ
May 22, 2004
#2
  • May 22, 2004
  • #2
by the way i will only have two cats on the aftermarket shorty x with l/t. 02gt
 

GoBabyVroommm

Active Member
Mar 22, 2003
1,156
0
36
Chicago, For Realss???!!!
May 22, 2004
#3
  • May 22, 2004
  • #3
I don't see why your car wouldn't pass if everything is runing fine yours kool. Don't quote me on it I still haven't went to emissions with my LTs on.
 

kirkyg

Founding Member
Jun 14, 2002
3,568
1
56
Beaumont, TX
May 22, 2004
#4
  • May 22, 2004
  • #4
doubt it...from what everyone is saying state/federal laws are stricter and stricter and they are not going to let anyone that barely fails by. Your taking a big chance unless you know someone who can hook you up even if you fail.

My opinion is do some talking and find out an out of the city rural area in your state that people can inspect and not worry about uncle EPA riding him.

kirkyg
 

ADRENLN

Active Member
Apr 16, 2003
2,342
3
49
NJ
May 22, 2004
#5
  • May 22, 2004
  • #5
ive been trying to figure out the difference between shortys and l/t, both have air comming out of the engine and travel through different lenths of pipe and then through the cats? unless aftermarkek catted (2 cats) mid pipes dont pass either? but i thought thats what they were for.

anyway i know many guys on here have long tubes and knoe everything about these cars. please chime in i really want the long tubes.

also on the slp website they state that these long tubes will hook up to all factory emissions equipment. that seems good but i really dont know.
 

pony_vert02

New Member
Mar 16, 2004
285
0
0
AUSTIN,TX
May 22, 2004
#6
  • May 22, 2004
  • #6
ADRENLN said:
ive been trying to figure out the difference between shortys and l/t, both have air comming out of the engine and travel through different lenths of pipe and then through the cats? unless aftermarkek catted (2 cats) mid pipes dont pass either? but i thought thats what they were for.

anyway i know many guys on here have long tubes and knoe everything about these cars. please chime in i really want the long tubes.

also on the slp website they state that these long tubes will hook up to all factory emissions equipment. that seems good but i really dont know.
Click to expand...


I don't think they will pass. Anyway, "hooking up to factory emissions equipment" doesn't mean it'll pass the strictions... If you have too much C02 coming out of that pipe, you just have too much, regardless of your setup. They haven't passed the emissions law in Tejas yet, but it's coming in the next year or so. I'm keeping my stock H-PIPE and will install just in case. I don't have LT's, so that'll help me there. Does anyone know if the state of GEORGIA have emissions? We're entertaining the idea of possible moving there.
 

99greenstang

New Member
Mar 1, 2004
28
0
0
Chicago Area
May 22, 2004
#7
  • May 22, 2004
  • #7
pony_vert02 said:
I don't think they will pass. Anyway, "hooking up to factory emissions equipment" doesn't mean it'll pass the strictions... If you have too much C02 coming out of that pipe, you just have too much, regardless of your setup. They haven't passed the emissions law in Tejas yet, but it's coming in the next year or so. I'm keeping my stock H-PIPE and will install just in case. I don't have LT's, so that'll help me there. Does anyone know if the state of GEORGIA have emissions? We're entertaining the idea of possible moving there.
Click to expand...


I would really like to understand this as well. I just talked to an exhaust guy today and asked him if long tubes were illegal or would help you fail emissions. As far as he told me, they aren't illegal (granted local or state laws in your area could change this) and would NOT allow you to fail emissions by themselves. Where most people end up failing is because they don't have the emissions equipment hooked up, or removed it comepletly.

As far as the more CO2 idea, I understand where you are coming from, but (someone correct me if I am wrong) as far as I understand, exhaust won't create any of those bad components, the engine does. Exhaust only moves them away from the engine and out the back of the car. Now, if you installed LT and the corresponding H or X pipe, your emissions should not change from the original. Your engine is still putting out the same amount of exhaust, you only get a power advantage because it does not have to force air out of the exhaust now. Am I on the right track anyone?
 

gruntman31

Founding Member
Apr 22, 2002
624
0
0
Colorado Springs, Co
May 22, 2004
#8
  • May 22, 2004
  • #8
I pass CO emissions with a MAC catted H. You should be able to pass with LT's.
 
M

mustangman70

Founding Member
Dec 30, 2001
1,235
1
0
St pete, Florida
May 22, 2004
#9
  • May 22, 2004
  • #9
Boy do i love florida.........no emissions here
 

ADRENLN

Active Member
Apr 16, 2003
2,342
3
49
NJ
May 23, 2004
#10
  • May 23, 2004
  • #10
well i sent an e mail to slp about this and hope to hear from them mon. or tues. i dont know if they will tell me the truth if they want a sale, but now im leaning toward not getting the l/t it is too much of a chance. i can throw a mid pipe on and off for emissions if i have to, but no way am i going to do this with long tubes. its sucks though, the l/t make so much torque! oh well
 

StangLou

Active Member
Jul 9, 2003
1,264
0
36
Holly Springs, NC
May 23, 2004
#11
  • May 23, 2004
  • #11
Your best bet man is to check with you State/County Laws. You should be able to fine a link on the dmv or dot site for your state on emission laws. Another thing you could do is actually ask an inspection site in your area. Just be like hey man, I am wanting to do this to my car, it will still have cats, will you guys be able to pass it. Most places if your cool with them will be cool with you. You might not get the answer your looking for, but you will know for sure
 

pony_vert02

New Member
Mar 16, 2004
285
0
0
AUSTIN,TX
May 23, 2004
#12
  • May 23, 2004
  • #12
gruntman31 said:
I pass CO emissions with a MAC catted H. You should be able to pass with LT's.
Click to expand...

That's great news that your catted H delivered! That means hopefully my catted X will pass as well.. But, most LT's don't have cats.. Really think about your stock H pipe. If FORD put 4 cats on my stock pipe to fall within Federal emissions guidelines, (and it's possible that 4 is over-kill) don't you think having anything less than that # would potentially jeopardize your ability to pass?? Cats were designed to heat up and convert excess co2 into harmless water and vapor... without cats, I don't see how you could possibly pass.. I could be wrong in my assessments... This is the only reason I haven't purchased LT's so far. Unless somehow your shop welded(s) cats onto your midpipe, I don't see anyone passing.. these laws are getting more and more strict..It's possible my catted X won't pass.. That's why I'm keeping my stock pipe... just in case.. The real test will be when fellow stangers start taking the test and letting us know. This won't hit Tejas, at least Austin for another year or so... I hope I made sense..
 

warment

Founding Member
Aug 23, 2000
339
0
0
Spotsylvania, VA
May 23, 2004
#13
  • May 23, 2004
  • #13
Don't know if the car will pass or not, but I have heard that long tube headers don't allow the catalytic converters to get up to operating temperature (i.e. they don't get hot enough), and thus cause more emission.

Is there any truth to this?

Bill
 

ADRENLN

Active Member
Apr 16, 2003
2,342
3
49
NJ
May 23, 2004
#14
  • May 23, 2004
  • #14
the l/t set up i WAS going to do did have two cats on their special shorty x.

good point about the cats being too far back. dont know if it is true, i really have no idea.

i think this is just going to be to much trouble for me i guess im stuck with a regular catted mid pipe for now.

however i might still go with the slp x cause if they all of a sudden get rid of emissions for some reason, or my car becomes a classic in 15 years or whatever it is, then i can get their l/t with out changing midpipe.


keep your options open!
 

FallenPhoenix

New Member
Nov 22, 2003
911
0
0
Odessa Tx
May 23, 2004
#15
  • May 23, 2004
  • #15
warment said:
Don't know if the car will pass or not, but I have heard that long tube headers don't allow the catalytic converters to get up to operating temperature (i.e. they don't get hot enough), and thus cause more emission.

Is there any truth to this?

Bill
Click to expand...

if they are ceramic coated they should keep enough heat in the exhaust to light off the cats, I'd drive around for 20-30 minutes before the test just to make sure they're at operating temps.

As far as longtubes changing the emissions, there are several factors, firstly being that more exhaust gases are actually exhausted from the combustion chamber so the next combustion process has less to dilute it, and so on. Thus you're burning more raw components that create emissions.
 

snoopy98

Founding Member
May 11, 2002
518
0
0
florida,jacksonville
May 24, 2004
#16
  • May 24, 2004
  • #16
i got a friend that had bbk long tubes and he failed
 
T

titanium8850

New Member
May 2, 2003
64
0
0
Atlanta
May 24, 2004
#17
  • May 24, 2004
  • #17
Georgia has emission laws in the Metro Atlanta Area. Any county that borders the city of Atlanta is in the "Clean" Air Force. They are suppose to be expanding this out south to Macon.
 

pony_vert02

New Member
Mar 16, 2004
285
0
0
AUSTIN,TX
May 24, 2004
#18
  • May 24, 2004
  • #18
titanium8850 said:
Georgia has emission laws in the Metro Atlanta Area. Any county that borders the city of Atlanta is in the "Clean" Air Force. They are suppose to be expanding this out south to Macon.
Click to expand...


Thanks bro! I guess I will be packing that stock pipe after all!
 
You must log in or register to reply here.

Similar threads

Z
Progress Thread zeth194 - New Guy on the Block
  • zeth194
  • Mar 19, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
10
Views
580
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Apr 26, 2026
LILCBRA
A
Discussion on mild budget build/ top end
  • Acesario
  • Feb 21, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
20
Views
753
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Feb 23, 2026
General karthief
Exhaust 1 3/4” Long Tubes on a Fox Body AOD – Easiest route?
  • 5.0 Mike
  • Mar 19, 2025
  • Fox 5.0 Mustang Tech
Replies
6
Views
2K
Fox 5.0 Mustang Tech Mar 21, 2025
5.0 Mike
B
Purchasing 1st Fox, need advice
  • Blown02svt
  • May 30, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
38
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 21, 2025
manicmechanic007
J
Car Diagnosis
  • j.2016
  • Aug 31, 2025
  • 2015 - 2023 (S550) Mustang -General/Talk
Replies
3
Views
336
2015 - 2023 (S550) Mustang -General/Talk Aug 31, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?