Livernois DP's

[NotBadForALincoln]

If i opt to get the DP's with no Cats, will they tune out the check engine light or will i have to get some sort of eliminator?

 

[SM105K]

They will tune out the CEL.

 

[NotBadForALincoln]

They will tune out the CEL.

Thank you.

 

[bpd1151]

Although the CEL won't be visible to you, your car still won't pass emissions though, as the readiness indicators will be programmed off, thus causing a 'fail' at your respective testing facility.

Just FYI.

 

[NotBadForALincoln]

Although the CEL won't be visible to you, your car still won't pass emissions though, as the readiness indicators will be programmed off, thus causing a 'fail' at your respective testing facility.

Just FYI.

Good to know.

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[6500rpm]

Do they make a "cheater" HO2S2 to fool the readiness test?

 

[StealBlueSho]

Do they make a "cheater" HO2S2 to fool the readiness test?

There are defoulers that work...


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[OmaHahn]

Is there a real, tested benefit of not having cats on DPs?

 

[Johnbigdog]

Well, I have not tested it, but you have a honey comb in the exhaust stream. It's a restriction no matter how you look at it. Flow will be reduced some. If you can't ****, you won't eat. When the exhaust is exiting it creates a vacuum behind it as well as a pulse. This will be affected by flow characteristics. Flow out easier, flow in easier.

Turbochargers need expanding gasses/heat to spin the turbine and subsequent compressor. If those gasses can't get out, there is no spool.

Also, catless downpipe weigh less so faster car. Well, I may be pushing it here.

How much of a performance gain there is with one or the other is a question best asked to LAS. They likely have dynoed the same car with the two parts to get an idea of the actual difference.

 

[limited02]

Is there a real, tested benefit of not having cats on DPs?

Non-tuned, but a comparison: https://www.ecoboostperformanceforum.com/index.php/topic,2054.0.html

 

[Signal13]

New guy question,
Is there any drawback to just using the LMS downpipes with the stock mufflers? I’m not the biggest fan of exhaust on a V6, just sounds anemic coming from a V8.


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[SHOdded]

IDK. The Corsa sounds pretty good, Dynomax mufflers too, and then there is bpd's custom exhaust, to mention a few. Drone can be tuned out with a custom resonator.

 

[ToMang07]

IDynomax mufflers too, and then there is bpd's custom exhaust, to mention a few. Drone can be tuned out with a custom resonator.

Dynomax on mine..... I like them a lot, however they do get a bit of a loud drone at certain RMPs, mostly uphill tho. If it bothers me I just use the paddle shifters to switch gears and forget about it. Just FYI. (I'm catless tho)

 

[ToMang07]

And a mod fix that to RPMs? lol