Quote:
Originally Posted by frankenm
I have some that have mini-cats in them and they didn't work there are quite a few designs and options available on eBay and around the web, those fabspeed ones are just ridiculously overpriced.
Given the density of the OEM cats I'm really doubtful any design is going to work, theres about two inches of cat material between the first o2 and the mid cat o2 and these mini cats have very little material in them.
I'll post some pics of what I have, if these things actual work it would be wonderful but I have serious doubts about them and wouldn't risk the $200 price tag.
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I am very sorry to hear about your disappointment in the mini cats. We have had some great success with our mini cats.
There are a couple of different issues that can arise when using these:
First, and foremost they are not 100% effective if too much exhaust gets through (with no cat) the spacers are not very big so they will continue to throw CEL. The is about a 3.5 to four inch cat in the spacer.
Second, Sometimes the codes get thrown because of how long the exhaust has to travel to get up to the sensor. The sensors do not like the extra distance that the exhaust has to travel.
Third, We do have the 90 and 45 degree angle but 99% of cars use the 90 so that is what we offer most of the time.
The $200 price tag is a little bit of a gamble. You should really tune if you are doing a catbypass to get the most out of the upgrade.