can anyone tell me what this ring is for? it is about the same diameter as the resonator flange. it almost looks like solder or pewter. i would contact the sell, but i bought if off ebay and didnt feel like waiting days for an answer. any help is appreciated.

 

Doughnut gasket. It goes on the end of the downpipe where it meets the cat or test pipe.

 

you'r exhaust probably sounds raspy im guessing put it on. makes a good difference

 

thanks for confirming!

thats what i was thinking. so using it, is it ok for the flanges not to be flush flat? looks like ill have maybe an 8th inch gap between the actual flanges. does it need to be heated or anything?

@ b swapped - yeah very raspy, just got it in today and was setting it up in the house. all i needed was the resonator, but the last owner welded a straight pipe to the downpipe. funny thing, the straight pipe had flanges on both sides. one side was bolted to the catback and the other flange was welded. could have easily turned the pipe til the flanges lined up...didnt make any sense to me.

 

Nope it just "slips on" maybe need to push on it a bit.

 

There needs to be a gap, you also need spring bolts. That gasket and the spring bolts allows for some movement so the exhaust doesn't crack.

No.

 

is this the gap you're referring to?

edit: just saw previous post...thanks ebay for sending me most of what i need... can i get the spring bolts at any auto chain store?

 

yes that's the gap and yes you can go to auto zone or some place like that coast maybe 10-12$ if not less

 

Yes

Also yes.

 

thanks again!

you both are gentlemen and scholars!

 

If your on obd1 put your O2 sensors in the bottom bung as seen in your pic and not in the upper one.

 

any reason why, care to explain? not trying to be smart, just curious. also, you said "sensors"...i know i have one on the headers in the car now, am i supposed to have more? engine is a d15b7

 

bump...

will be installing in 3hrs. anyone care to chime in on where to put my o2 sensor?

 

from what I understand it goes in the lower bung for better sampling for gasses.
dave

 

If your car is OBDII (meaning 96 or newer, in some rare cases 95), you have an "upstream" O2 sensor in the header/exhaust manifold to measure the AFR right after combustion, and a "downstream" O2 sensor installed at the END of the catalytic converter to measure the changed AFR to ensure that the catalytic converter is working properly. Otherwise just plug those bungs and carry on.


Care to tell us what happened with the spring bolts? I need a set, and a properly fitting doughnut gasket. That is not a very quality looking piece you have there.

 

I meant sensor. Typo. Anyway ^^ that's why. Also your ecu can throw a cel if the o2 is up top and not in the lower bung.

 

went to az and bought some spring bolts(oem replacement), they worked with no problem. paid like $15 or something like that. they had trouble finding out what i needed. they finally found it in their catalog after i explained that it connected the downpipe to the cat. this was then confirmed by the handy pictures on their computer. as far as the gasket, i just threw it on and rolled with it.

i didnt feel like extending the o2 wiring, so i put it in the top bung(thats were it was before). no codes.

 

I could really use those part numbers or a SKU if you still have them because I am in need of the same thing lol.

 

For what, the sprung bolts? You can get them at any auto parts store in the "emergency fasteners" isle, or (rarely) behind the counter.

 

**correction, i bought it at advance auto and they have them for $10.89.

im at work, just called the same store i bought it from. the p/n is 2108-18231. they told me over the phone that it is a direct ship from the mfg and it gets delivered to your home. they did have them behind the counter, so maybe i got lucky and they had a return.

rockauto.com and autozone.com has them:
dorman p/n: 03146
walker p/n: 35129
ap exhaust p/n: 4682

looking up the parts at advance online, they show that they are stocked in store...