• Community Forums
  • Regional Forums and Event Information

Oregon DEQ and Headers

  • Thread starter Thread starter bchilt
  • Start date Start date Apr 5, 2008

bchilt

New Member
Jan 7, 2007
23
0
1
Beaverton
Apr 5, 2008
#1
  • Apr 5, 2008
  • #1
I sure would like to run Long Tubes but I have to take the car through DEQ. Any of you have any experience with this? On pre 1996 cars, I know they use mirrors and check for cats. That's what they did on mine last time. Do they fail you if they see the LTs?

Thanks,

B
 

yello05

New Member
Dec 14, 2004
0
0
0
Starbucks!
Apr 5, 2008
#2
  • Apr 5, 2008
  • #2
They wont care about the LT's but yes, they will look for cats.
 

Steel Steeds

New Member
Aug 31, 2005
234
1
0
Portland, OR
Apr 5, 2008
#3
  • Apr 5, 2008
  • #3
I've had 3 vehicles with Long Tubes go through DEQ. The only thing that they nail me for is the noise. On my Bronco, I have to unbolt the headers and put baffles in place to quiet things down. Even then, I barely pass, and sometimes don't if they have me in the stall closest to the wall. As soon as I'm home and the pipes cool down, the baffles come out and I'm good for 2 years.

It's easier on the '96+ vehicles. They just plug in and read your computer. Without the sniffer test, they never have you rev up and never realize how loud your vehicle is. My old '98 Cobra was louder than the Bronco, but no problems at all.
 

SMOKEDYA

20+ Year Stangneter
Jul 13, 2003
3,637
8
79
Tucson AZ
Apr 5, 2008
#4
  • Apr 5, 2008
  • #4
They really look under the car with mirrors? How stupid! peace



john
 

86turbo

Member
Apr 8, 2006
183
0
17
Apr 7, 2008
#5
  • Apr 7, 2008
  • #5
run longtubes and get a catted midpipe. As far as noise, put some silencers in your exhaust or stick steel wool in there. They only do an idle test and the HC's are the only issue, along with noise you'd have to worry about. If your car is modded take out the diverter valves for the smog pump and hook it straight to the exhaust....

If that still doesnt work then loosen up your tailpipes so it leaks out over the axle tubes. It will be loud and they will do a db test but they can only check at the tips of the tailpipes...

True story: I did everything above on my 2.3 car before I yanked the engine and i have a slip showing zero emissions....hahahhaha they had to pass me.

no prob...

Drew
 

fiveohwblow

Official Member
15 Year Member
Jul 21, 2005
2,169
145
155
Apr 7, 2008
#6
  • Apr 7, 2008
  • #6
86turbo said:
run longtubes and get a catted midpipe. As far as noise, put some silencers in your exhaust or stick steel wool in there. They only do an idle test and the HC's are the only issue, along with noise you'd have to worry about. If your car is modded take out the diverter valves for the smog pump and hook it straight to the exhaust....

If that still doesnt work then loosen up your tailpipes so it leaks out over the axle tubes. It will be loud and they will do a db test but they can only check at the tips of the tailpipes...

True story: I did everything above on my 2.3 car before I yanked the engine and i have a slip showing zero emissions....hahahhaha they had to pass me.

no prob...

Drew
Click to expand...

Some good tricks!!!
 
9

94v6GT

New Member
May 13, 2006
141
0
0
Apr 7, 2008
#7
  • Apr 7, 2008
  • #7
86turbo said:
If that still doesnt work then loosen up your tailpipes so it leaks out over the axle tubes. It will be loud and they will do a db test but they can only check at the tips of the tailpipes...
Click to expand...

clever yet simple, i like.
 

86turbo

Member
Apr 8, 2006
183
0
17
Apr 7, 2008
#8
  • Apr 7, 2008
  • #8
emissions sucks. Its pretty cool to roll into a deq and lean out idle via pms, pass with flying colors then set it back to stoich and blow the steel wool out the back hahaha.
 
You must log in or register to reply here.

Similar threads

Engine Keeping O2 sensors lit with long tube headers
  • keel
  • Jul 30, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
114
Fox 5.0 Mustang Tech Jul 30, 2026
AeroCoupe
G
S550 Headers
  • gray owl
  • Feb 1, 2026
  • 2015 - 2023 (S550) Mustang -General/Talk
Replies
0
Views
232
2015 - 2023 (S550) Mustang -General/Talk Feb 1, 2026
gray owl
G
WTB 89 Hatchback interior trim - any color
  • Zero_chance
  • Jun 14, 2026
  • Want to Buy
Replies
2
Views
89
Want to Buy Jun 14, 2026
Noobz347
R
For Sale 2008 Mustang Bullitt for sale Richmond Hill, ON, Canada L4C 0S3
  • ROHDRNNR
  • Jun 10, 2026
  • S197 Mustangs For Sale (2005-14)
Replies
0
Views
174
S197 Mustangs For Sale (2005-14) Jun 10, 2026
ROHDRNNR
R
Fox Mid Pipe
  • 93gtmustang
  • Oct 20, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
5
Views
283
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 21, 2025
Mustang5L5
Share:
Bluesky Email Share Link
  • Community Forums
  • Regional Forums and Event Information
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?