Thread: Will removing the catalytic converter make the 08 models burn more gas??

Hello everyone. I am considering removing my cat and going with a straight pipe instead of buying a new one. But I have heard from a few people that the 08 models must have a cat or it will burn gas like crazy. Does anyone know for sure if this is true for that particular year??

Nothing good comes with removing the cat. Car is going to fail emissions, it will set codes on the dash, probably will affect mileage and it's going to smell like ass when it's idling with your windows open.

I wouldn't bother.... Put a high-flow cat on if anything instead of going without. Those can be had for <$100 instead of $300+ for an OEM comparable at a muffler shop.

I am sure someone will come in say "but you'll have more POWAAAAA". Unless your car is insanely balls-to-the-wall modified, I see it being very negligible.

Originally Posted by mcdavidhome

Hello everyone. I am considering removing my cat and going with a straight pipe instead of buying a new one. But I have heard from a few people that the 08 models must have a cat or it will burn gas like crazy. Does anyone know for sure if this is true for that particular year??

Thanks for the info

Originally Posted by Fivefingerdeathpunch

It will likely use more gas if it keeps running a cat test because it's no longer there. And the check engine light will always be one and being a 2008 is got a year only computer with can bus.

I would find an aftermarket cat and weld it in place. I would not get a high flow unit as it does what it says, flows too well for what the car wants to see.

Thanks for the input..

Originally Posted by Damnir

Nothing good comes with removing the cat. Car is going to fail emissions, it will set codes on the dash, probably will affect mileage and it's going to smell like ass when it's idling with your windows open.

I wouldn't bother.... Put a high-flow cat on if anything instead of going without. Those can be had for <$100 instead of $300+ for an OEM comparable at a muffler shop.

I am sure someone will come in say "but you'll have more POWAAAAA". Unless your car is insanely balls-to-the-wall modified, I see it being very negligible.

Thanks for the info...

Go cat-less and get a tune that way the codes won't show up and you won't burn thru gas

Originally Posted by HighOctaneRacing

Go cat-less and get a tune that way the codes won't show up and you won't burn thru gas

Ok thanks.

Originally Posted by REDCOMPG

Get a high flow cat and either a tune or use the spark plug fouler trick..

ok. How can i get instructions on doing the fouler trick?

Originally Posted by Below Average Joe

Youtube it.

https://www.youtube.com/watch?v=KnYUHwTxKkE

This will get you started.

Thanks!

Originally Posted by Fivefingerdeathpunch

Because you can't. I already said why, year only computer with can bus.

Please forgive my ignorance, but can you explain what "year only computer with can bus" mean?

Originally Posted by theaceofspades

It's a locked down pcm

Thanks!