Nitto Mid-Pipe Check Engine Light fix

[YarisSedan]

Why are you guys removing your cats anyways. 1 you remove all the backpressure which you need. Sure you will get more power but you are seriousely going to impact your fuel economy which is why most of us bought this car in the first place? Second for the slight power you are going to achive which could be only 5hp at the most as opposed to doing a midpipe from the cat back. You are going to cause an extreme amount of polution. As well as mess up egr function. Not to mention how loud it is going to be. So now if you dont like this sound you will have to choose to have a restrictive muffler to muffle the sound which you could just have a nice open muffler with a cat since a cat muffles sound more than your muffler does.

Also I know in california check engine light is automatic smog failure. Not to mention it would automatically fail anyways since you have no cat.

Unless someone can prove me wrong and have thier vehicle smoged without any cats on it would be interesting to see how much emissions our little engines produce. We do have 2 cats though and its not a zero emission vehicle even with those 2 cats. HC is going to be low probally but it probally has a problem with nox

[eTiMaGo]

Originally Posted by YarisSedan

Why are you guys removing your cats anyways. 1 you remove all the backpressure which you need. Sure you will get more power but you are seriousely going to impact your fuel economy which is why most of us bought this car in the first place? Second for the slight power you are going to achive which could be only 5hp at the most as opposed to doing a midpipe from the cat back. You are going to cause an extreme amount of polution. As well as mess up egr function. Not to mention how loud it is going to be. So now if you dont like this sound you will have to choose to have a restrictive muffler to muffle the sound which you could just have a nice open muffler with a cat since a cat muffles sound more than your muffler does.

Also I know in california check engine light is automatic smog failure. Not to mention it would automatically fail anyways since you have no cat.

Unless someone can prove me wrong and have thier vehicle smoged without any cats on it would be interesting to see how much emissions our little engines produce. We do have 2 cats though and its not a zero emission vehicle even with those 2 cats. HC is going to be low probally but it probally has a problem with nox

Some very valid questions there, here's my point of view.

1) Those who bought this car solely for the fuel efficiency will never want to get one of these anyway But there are some of us who like to balance the efficiency with some added fun.

2) Pollution, yes, this is a weak point of this product, as there are no cats it does dump raw exhaust. On the other hand, with "only" a 1.5L engine it produces just a fraction of the noxious stuff that you'd get from a catless V8, for example.

3) Noise? Ask anyone who has installed one, it actually really softens the exhaust note, what with 3 resonators... Totally different from a plain straight pipe.

4) OK, here there are no such things as smog checks. But for those in the US, it's relatively easy to swap back the original midpipe for the inspection.

So, as with any aftermarket part for a car, it's the owner's choice. As of the time of writing, this midpipe is the only "bolt-on" choice available, though it would certainly be nice to see some other company come up with a better alternative

[largeorangefont]

Originally Posted by YarisSedan

Why are you guys removing your cats anyways. 1 you remove all the backpressure which you need. Sure you will get more power but you are seriousely going to impact your fuel economy which is why most of us bought this car in the first place? Second for the slight power you are going to achive which could be only 5hp at the most as opposed to doing a midpipe from the cat back. You are going to cause an extreme amount of polution. As well as mess up egr function. Not to mention how loud it is going to be. So now if you dont like this sound you will have to choose to have a restrictive muffler to muffle the sound which you could just have a nice open muffler with a cat since a cat muffles sound more than your muffler does.

Also I know in california check engine light is automatic smog failure. Not to mention it would automatically fail anyways since you have no cat.

Unless someone can prove me wrong and have thier vehicle smoged without any cats on it would be interesting to see how much emissions our little engines produce. We do have 2 cats though and its not a zero emission vehicle even with those 2 cats. HC is going to be low probally but it probally has a problem with nox

Removing the cats does not remove all the backpressure, The car will make a couple HP more. Removing them will not change the fuel economy, and it will not mess up EGR either. The car will smell a bit, and may be slightly louder when catless.

It will not pass a sniffer test in CA, but cars do not need to be smogged for 6 years after buying a new car. Passing is as simple a swapping the midpipe to the stock unit for the smog check.

It has been proven that using a high flow cat will give you about the same HP as going catless. It may pass smog that way if the cat is placed in the correct spot, and the car won't smell. This would mean constructing a custom midpipe.