BaiFM O2 Check Engine Light CEL 90 Degree Angled Fix Oxygen Spacer Exhaust Extension - 4Pieces Kit

I haven't had time to try this, but shipment was quick and the machining of the parts is professional. Whether this does what I want it to or not will not be because of the quality of the parts. That's why the 5 stars.

I used on my 2005 Scion Tc i had bad cat so i used only one spacer . this works like a pro .. do not waste money on cat just buy this and extend the O2 sensor you will save thousands of dollarsSome of you may say you need to put new cat because save the environment how about you start recycling plastic insted of talking about emission control rules ...

So it's a fair good product but it didn't help me with my CO2 situation with my high flow cat on my 2008 Mini Cooper S it it didn't change anything on my situation , wasn't the real problemp these computers nowadays are pretty damn smart,!

Used these on my 2000 VW Passat. they did the trick and seem like they will last as long as the exhaust. Highly recommend.

they work like a 60's style oil fouller you put them in line of your o2 censors and sends the exhaust to a different passage and stops light from coming on thanks again

Well designed. I opted for the 90* bend unit of the 3 that come with. It has a lock nut to position the o2 where you need it. After an ecu reset it’s tricked the computer so far.

Great for tight spaces.

Happy with this product as it did solve my engine light issue.