ebay exhaust question

[stangsoldier89]

found the full stainless exhaust on ebay for $180 for my 91 sedan. has anyone had any problems with a check engine light after installation? i do not plan on keeping the cat.

[cbr-dee]

As long as there is a spot for the o2 sensor, you will not set off the CEL.

[stangsoldier89]

thanks! the kit i found has both the upstream and downstream bungs for the o2s. hoping with this new kit to gain some mpg along with a cai

[Jarrett]

Why do you not intend on keeping the catlytic converter. The power gain is negligible on these cars and the factory catalytic converter bolts right up. The lack of the catalytic converter makes the car sound like ass.

[stangsoldier89]

the inside of mine is blown out and it rattles as well. in my state the car is tagged historic and no inspection is needed. i was not aware of the sound issue with the delete but now that you said that i will look for a replacement.

here is the link for the exhaust system i found if that helps at all

http://www.ebay.com/itm/111222640463

[bobbycos]

here in NY my cb (90 LX) is safety only inspection now, i have the ebay high flow replacement cat and it is basically no difference in power output.

[stangsoldier89]

thanks i will look into that. what exhaust are you running?

[deevergote]

Keep in mind that eBay is just an auction site. It does not sell anything specific. Your "ebay exhaust" may be very different from others. Furthermore, all of that cheap stuff is going to vary considerably from batch to batch. Consistency in manufacturing is one of the first things that gets compromised when costs are cut like that.

There is nothing after the o2 sensor that would cause the check engine light to come on. As long as the sensor is installed and functional, everything behind that (including the catalytic converter, piping, resonators, and muffler) will have no effect on it... unless the cat gets clogged, that is.

I would definitely replace the cat. You'd be better off with another OEM unit, rather than a high flow replacement. The high flow units seem to fail fairly often, whereas our OEM pieces will last for well over a decade. As Jarrett said, the design of the OEM cat is fairly free-flowing, so there is little power lost. Without a cat, the exhaust will undoubtedly sound raspy (especially a cheap "ebay" exhaust), and the exhaust fumes will smell terrible.
Replace the cat (high flow or otherwise... as long as it's functional.) You'll thank yourself.
If you plan on racing, and you want every last possible HP from your setup, get a cat that is removable, and get a test pipe to install for track use only. When you return from the track, remove the test pipe and install the cat.

[bobbycos]

Deev is right on the money with his info on cat replacement. I went the cheap eBay route when I first got my cb and that was before I found cb7 tuner. If I had it to do over again I would definitely use a quality product.

[af_1132]

Furthermore, all of that cheap stuff is going to vary considerably from batch to batch. Consistency in manufacturing is one of the first things that gets compromised when costs are cut like that.

stangsoldier89, keep in mind what Deev said here as well. Because of the quality of manufacturing techniques for these cheaper exhaust systems, fitment issues/incompatibilities may arise during installation. These are a pain and not worth the money saved. If you can, save up for a while and purchase a higher quality system from a well-established company. There is a recent exhaust thread in this section with some high quality systems discussed. Check it out if you have not already.

You'll find members on here conversing about "ebay intakes", "ebay exhausts", "ebay headers" etc. They are referring to the generic and knock off companies that sell products on Ebay. You might already know this, but if not, just trying to help.

Good luck.

[stangsoldier89]

Thanks guys. Gonna look into other systems as well now