Catted DP

nickkim1499

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I am keeping away from catless DP's (although that would be awesome to have) because I do not want to get a tune and void my warranty. I was able to get a lifetime bumper to bumper warranty. Are there any catted (high flow) DP's that guarantee no CEL? I know AA has one...




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gdi2290

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any of the catted DP should be fine but keep in mind a DP does voids your warranty if the dealership notices/cares


 

zamiel

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Why would the catted downpipe void your warranty, unless the issue/failure was directly related to that part?
 

Supraboi7

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Noob question but isn’t the main benefit of a downpipe quicker spool up and the power coming on stronger sooner? (Aside from sound) Like overall gains are modest with a stock tune but it’s more responsive?
 

Supraboi7

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And no i don’t see a catted downpipe voiding a warranty, if anything the reduction in back pressure would be beneficial for the longevity of everything i would think
 

a90moe

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Noob question but isn’t the main benefit of a downpipe quicker spool up and the power coming on stronger sooner? (Aside from sound) Like overall gains are modest with a stock tune but it’s more responsive?
From dyno graphs I've seen, on stock tune it tends to benefit up top around 15-20whp
 

Supraboi7

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From dyno graphs I've seen, on stock tune it tends to benefit up top around 15-20whp
I’ll take that, i don’t need a 10 second car
 

JoshMerakiAutoworks

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AA catted downpipe does not cause a CEL. Benefits of a DP include a lot more power than the stock catted downpipe and you can tell why when you compare them side by side.

Technically any aftermarket part on a vehicle can void warranty if it makes sense. Changing your springs and having your shocks go bad, a dealer can blame the springs and void your suspension warranty. Changing a DP and your secondary cats go bad will lead to them voiding warranty, things like that. Thats why you either to have a good service advisor or take it off before taking the car in for any related service..

We have catted AA downpipes in stock if anyone is interested, other brands as well!

-Josh
 

Waferz

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ANY downpipe will void warranty if it causes something around it to break and they decide to do some digging. The ECU stores high values so any numbers that go higher due to the downpipe will be a telltale sign that you’ve modded something even if/when it’s removed.

Bottom line: Choose your warranty or mods.
 

Waferz

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I am keeping away from catless DP's (although that would be awesome to have) because I do not want to get a tune and void my warranty. I was able to get a lifetime bumper to bumper warranty. Are there any catted (high flow) DP's that guarantee no CEL? I know AA has one...
Did you read the fine print? Your lifetime warranty is likely only existent if you follow the manufacturer maintenance to a T and pay the dealership you purchased from for every bit of maintenance. Unless you plan on going to the dealer every time your manual or dealer says it’s time, you don’t have a lifetime warranty. Toyota does not offer one, your dealer does. And they do it hoping you pay them more for maintenance and never need the warranty or sell the car before you do. I would have fun with my car and not worry about that warranty. Hopefully you didn’t pay extra.
 

Extreme Power House

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I am keeping away from catless DP's (although that would be awesome to have) because I do not want to get a tune and void my warranty. I was able to get a lifetime bumper to bumper warranty. Are there any catted (high flow) DP's that guarantee no CEL? I know AA has one...
We offer Cg Precision and Active Autowerke downpipe. They both offer no CEL guarantee
 
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nickkim1499

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Did you read the fine print? Your lifetime warranty is likely only existent if you follow the manufacturer maintenance to a T and pay the dealership you purchased from for every bit of maintenance. Unless you plan on going to the dealer every time your manual or dealer says it’s time, you don’t have a lifetime warranty. Toyota does not offer one, your dealer does. And they do it hoping you pay them more for maintenance and never need the warranty or sell the car before you do. I would have fun with my car and not worry about that warranty. Hopefully you didn’t pay extra.

Yes, I was aware of the caveats to the lifetime warranty. I didn't pay extra so it was just an added bonus. I guess I'm just paranoid that a DP (catless or not) will somehow mess up my car if I don't tune it.
 

Waferz

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Yes, I was aware of the caveats to the lifetime warranty. I didn't pay extra so it was just an added bonus. I guess I'm just paranoid that a DP (catless or not) will somehow mess up my car if I don't tune it.
I personally never have and never will change a downpipe without a tune. The small power gains are not worth the risk. Venders will tell you differently, but its always been a no-no to put a downpipe on a turbo car with no tune. I’m sure these ECUs are smarter, but I’ve seen a fair share of engines get damaged because of this.
 

Supraboi7

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I personally never have and never will change a downpipe without a tune. The small power gains are not worth the risk. Venders will tell you differently, but its always been a no-no to put a downpipe on a turbo car with no tune. I’m sure these ECUs are smarter, but I’ve seen a fair share of engines get damaged because of this.
Say it ain't so, I wanted the AA catted downpipes with no tune :/
 

kurumi

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I personally never have and never will change a downpipe without a tune. The small power gains are not worth the risk. Venders will tell you differently, but its always been a no-no to put a downpipe on a turbo car with no tune. I’m sure these ECUs are smarter, but I’ve seen a fair share of engines get damaged because of this.
Modern cars with modern ECUs are a lot more smarter with things like high flow cats and intakes and will make adjustments within a given allowed ranged for more performance. The main thing to take away from this is any performance gain without a tune will not be that noticeable but the noise from the intake or downpipe is enough to persuade more than a few to make the leap.
 

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