exhaust systems - suggestions and tips on how to install - Page 3 - McLaren Life
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post #31 of 44 Old 05-22-2019, 04:12 PM Thread Starter
 
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Thanks Excelsior, always suspected the warranty would be void if the cats were changed or modified but is that still the case if only the last section after the cats was only changed?
I have checked with many dealers and dealers that have submitted warranty claims NOTING that the vehicle had a cat-back system - warranty was never an issue, PROVIDED the oem catalytic converters were left alone and untouched.


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post #32 of 44 Old 05-23-2019, 07:01 PM
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My dealer has told me that McLaren doesnt care if it is CAT BACK. Touch the catalytic converters and say goodbye to your warranty.
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post #33 of 44 Old 05-23-2019, 10:16 PM
 
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If you have some sort of engine failure just install factory exhaust prior to starting warranty repair. It's really easy in relation to killing the warranty. Odds of having a problem that would bring exhaust in question is slim.
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post #34 of 44 Old 05-24-2019, 12:09 AM
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If you have some sort of engine failure just install factory exhaust prior to starting warranty repair. It's really easy in relation to killing the warranty. Odds of having a problem that would bring exhaust in question is slim.
Problem is, changing exhaust in a 720 takes about 20 hours since there is a lot of disassembly required. That's about $2500-3000 each time you change the exhaust, just in labor.

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post #35 of 44 Old 05-24-2019, 12:57 AM
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Problem is, changing exhaust in a 720 takes about 20 hours since there is a lot of disassembly required. That's about $2500-3000 each time you change the exhaust, just in labor.
Interesting, We do it in 8hrs from start to finish.
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post #36 of 44 Old 05-24-2019, 02:24 AM
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Is that doing cats as well or just the muffler section and how many people working on it?

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post #37 of 44 Old 05-24-2019, 04:06 AM
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Problem is, changing exhaust in a 720 takes about 20 hours since there is a lot of disassembly required. That's about $2500-3000 each time you change the exhaust, just in labor.
Interesting, We do it in 8hrs from start to finish.
ive been quoted 16-20 hours from multiple shops. Wish someone local could knock this out in 8
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post #38 of 44 Old 05-24-2019, 07:33 AM
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Just saw this video of a mechanic doing his first 720S cat back exhaust


Early in the video he says he's done a 570 previously. Shows roughly what needs to be done and at just after 7 mins into the video when he is just about to clamp on the new exhaust it states that it took about 4 hours to get there which seems reasonable. Makes me think any quote for over 8-10 hours is BS.

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post #39 of 44 Old 05-24-2019, 01:17 PM
 
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Even my local McL dealer is sure to do in with approx 8 hours from start to stop....
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post #40 of 44 Old 05-24-2019, 03:24 PM
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Just saw this video of a mechanic doing his first 720S cat back exhaust

https://www.youtube.com/watch?v=Dmxc9Pc2zkI

Early in the video he says he's done a 570 previously. Shows roughly what needs to be done and at just after 7 mins into the video when he is just about to clamp on the new exhaust it states that it took about 4 hours to get there which seems reasonable. Makes me think any quote for over 8-10 hours is BS.
At the end of the video he said something like 30 hours. McLaren Houston quoted around $2K to do the work so its not egregious but still substantive if ANYTHING goes wrong with the drivetrain and you want warranty work done.
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post #41 of 44 Old 05-24-2019, 04:18 PM
 
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Its playing the odds. Odds are nothing serious will go wrong as these engines have become pretty solid. It's a worst case scenario that it will cost to have factory exhaust installed to save warranty. Once the warranty is expired we pay more than that to extend it.
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post #42 of 44 Old 05-25-2019, 02:44 AM
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I think part of the problem that was already mentioned is that if your dealer tags your car as having an aftermarket exhaust during a normal service visit ie annual service. If you do have an engine problem it will already be documented that you modified the exhaust so changing it back to stock may be in vain.
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post #43 of 44 Old 05-25-2019, 03:54 AM
 
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I had a 1 hour meeting with the service manager as well as 2 techs on this. At least at my dealer this is not the case. They document nothing when a car is in for service unless there is a problem and McLaren ask questions. My feeling is if I have an engine problem I will remove the exhaust and it will go in for service. This was also the recommendation of the dealership. Their main focus is their customers in the Hope we buy the next model.
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post #44 of 44 Old 06-06-2019, 01:08 PM
 
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Dear all, I've a sport exhaust and would like to have a little bit more grunt and volume from my car. Don't want to void warranty with cat removal, and don't want to remap the ECU. So, the only option would be to change the back-pipes with something more straight. Question is: is it going to make a sensible difference or not from the sport exhaust? Worth it or not?

And another question: the sport exhaust in Europe seems to have 2 levels of valves. I see one is positioned just at the end of the back pipes (they've been modified to remain always open) and it seems to me there're other valves that open up when in track mode, as the sound in my car get louder . Do you confirm? Is there anyway to keep those also always open?
Thank you for your help.
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