What Years had Cat Converters?
#2
Chapter President
For 2nd gens, 94 - 98 12v's were factory equipped with a cat with the exception of 94's that were manufactured before Jan 1/94. All 2nd gen 24v's (98.5 - 02) did not come with a converter but did have a resonator in place of the cat.
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#8
Registered User
Originally posted by 99 cummins
If they are just straight through how did that pass EPA standards if they had already been used on previous years.
If they are just straight through how did that pass EPA standards if they had already been used on previous years.
#9
Chapter President
The resonator is not an actual emissions device and was in no way intended to take the place of the cat - it simply aids the muffler with noise control......the 24v ECM controlled engines met the 98.5 to 02 federal emissions standards without a cat because of more precise fuel management over the P-pumped 12v's.
#10
Registered User
Exhaust systems
I have a 99 and it has 2 ??? down there. The smaller one is ahead of the resignator by about a foot ???. Maybe about 6"or 7" across. Was down there the other day trying to fix the shake from the rear axle. I lowered the steady bearing. Put in better front springs last year because the OEM's were sagged out after a year or so. I was told by cummins in several places that it isn't there but (everytime that I hit my head on it, it either hurts or brings blood )
#11
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That's why I was wondering, is because I have what looks like the Cat to me, but I was always told this year didn't have them. Have never pulled the exhaust to look inside it and see what's in there.
#12
Administrator
Re: Exhaust systems
Originally posted by neveragain
I have a 99 and it has 2 ??? down there. The smaller one is ahead of the resignator by about a foot ???.
I have a 99 and it has 2 ??? down there. The smaller one is ahead of the resignator by about a foot ???.
Bigger one is the muffler.
phox
#13
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I cut both off of my '99. The front one is a resonator and the rear is the muffler. It got loud real fast!!!! Still love the sound of that truck!!
#14
Administrator
94-98 12V engines had a cat converter.
98.5-02 24V engine did not have a cat because it met emissions requirements without the cat. It DID come equipped with a resonator for noise control. The resonator on a 24V gets confused for a cat.
03 and up trucks are equipped with cats due to emissions regulations, so as the song goes, "the cat came back...".
98.5-02 24V engine did not have a cat because it met emissions requirements without the cat. It DID come equipped with a resonator for noise control. The resonator on a 24V gets confused for a cat.
03 and up trucks are equipped with cats due to emissions regulations, so as the song goes, "the cat came back...".
#15
Originally Posted by 99 cummins
What year did they start putting in the cat converters on these trucks.