Replacing cats with straight pipe

[rrpederson]

Hey everyone, has anyone removed just the cats from the stock mid pipe, and replaced with the same diameter piping? I really like the way the car sounds stock, but just want the volume turned up slightly. I'm not even that concerned with making more power right now. Does anyone think this would be a viable option instead of buying a replacement off road mid pipe? I know that the 02 sensors will need to be turned off and all that. Just wondering about the exhaust note. Thanks.

Richie

 

[Ghoust]

I haven't done this however, I recently switched to an MRT off road pipe, keeping the stock catback intact. Here is how it sounds.

[video=youtube;xYPuY0m1h4o]https://www.youtube.com/watch?v=xYPuY0m1h4o&list=UUCS2jq2ta3deQa8E8SwPAYQ[/video]

 

[brad65ford]

Probably easier to just get an after market off road mid pipe for the time / money would be ten times easier.

The stock mid pipe flows pretty good for stock, if you doing tune and pulleys i say go for an off road for sure.

 

[Derek@Lethal]

Unless you are going to cut and weld the pipe on your own, you are probably going to spend close to the same money having your stock cats replaced with 2 pieces of straight pipe as you would buying a whole off road pipe. If you want to keep the car sounding about the same, just with more volume, go with an off road H pipe. We have some available that we have made with Stainless Steel and they are priced very well.

http://www.lethalperformance.com/sh...-2014-shelby-gt500-t304-3-stainles-50052.html

Let us know if you have any other questions.

Thanks.

 

[crucianpilot]

I haven't done this however, I recently switched to an MRT off road pipe, keeping the stock catback intact. Here is how it sounds.

[video=youtube;xYPuY0m1h4o]https://www.youtube.com/watch?v=xYPuY0m1h4o&list=UUCS2jq2ta3deQa8E8SwPAYQ[/video]

Sounds just like mine, love it!

 

[2011 gtcs]

I'm running lethal's stainless steal X pipe and I love it, it fit perfect and sounds better than the H pipe, but I have always been a fan of the x pipe over the H pipe.

 

[BrunotheBoxer]

Unless you are going to cut and weld the pipe on your own, you are probably going to spend close to the same money having your stock cats replaced with 2 pieces of straight pipe as you would buying a whole off road pipe. If you want to keep the car sounding about the same, just with more volume, go with an off road H pipe. We have some available that we have made with Stainless Steel and they are priced very well.

http://www.lethalperformance.com/sh...-2014-shelby-gt500-t304-3-stainles-50052.html

Let us know if you have any other questions.

Thanks.

Would I still pass the Massachusetts state inspection if I did this?

 

[BOSSPOWER]

Unless you are going to cut and weld the pipe on your own, you are probably going to spend close to the same money having your stock cats replaced with 2 pieces of straight pipe as you would buying a whole off road pipe. If you want to keep the car sounding about the same, just with more volume, go with an off road H pipe. We have some available that we have made with Stainless Steel and they are priced very well.

http://www.lethalperformance.com/sh...-2014-shelby-gt500-t304-3-stainles-50052.html

Let us know if you have any other questions.

Thanks.

+1

Manuel

 

[Derek@Lethal]

Would I still pass the Massachusetts state inspection if I did this?

Most likely not as there are no catalytic converters on that pipe. To pass inspection legally, you cannot touch your OEM H pipe (to my knowledge).

 

[ryan319]

Would I still pass the Massachusetts state inspection if I did this?

Does MA offer any kind of exemption? In my PA county if you put less than 5000 miles on your car per year it is exempt from emissions testing. You still have to go through the safety inspection but the functionality of the cats are not part of that.

 

[BrunotheBoxer]

Most likely not as there are no catalytic converters on that pipe. To pass inspection legally, you cannot touch your OEM H pipe (to my knowledge).

I hate this liberal state.

Does MA offer any kind of exemption? In my PA county if you put less than 5000 miles on your car per year it is exempt from emissions testing. You still have to go through the safety inspection but the functionality of the cats are not part of that.

I don't know but I doubt they do.

 

[Derek@Lethal]

I hate this liberal state.


I don't know but I doubt they do.

It's not just the state, I believe it's Federal law. But like ryan319 said, check your state then county laws to see if there are exemptions. Even in Florida, we don't have inspections at all, but it's still illegal for us to remove properly working cats, but we still do it anyways ;-)

 

[ThomasL]

It's not just the state, I believe it's Federal law. But like ryan319 said, check your state then county laws to see if there are exemptions. Even in Florida, we don't have inspections at all, but it's still illegal for us to remove properly working cats, but we still do it anyways ;-)

We sure do!!! epper:

 

[BahnRunner]

I will be cutting out my Cats and welding in straight pipes in their place. I live overseas and can't get a h-pipe shipped over here because they are oversized shipping and I am not spending $400 on shipping for a $400 pipe. Cutting and welding is too easy.

 

[BOSSPOWER]

It's not just the state, I believe it's Federal law. But like ryan319 said, check your state then county laws to see if there are exemptions. Even in Florida, we don't have inspections at all, but it's still illegal for us to remove properly working cats, but we still do it anyways ;-)

Cats, what are those??? I never seen mine...LOL!!!