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Lachute Performance Axle back - Mazda CX-50

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#21 ·
Sorry to hear of your experience @Goalseeker. Please keep us updated with the status.

Dpuck said:
BTW Corksport notes on their site that there is some variation in CX50 exhausts from the factory that can affect fit. For the new CS exhaust, they have a fit disclaimer and are working on a Ver2 exhaust that has adjustment to accomodate car to car variation. Food for thought.
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I was just coming here to post the same. Now knowing this, this is probably the cause of the issue that @Goalseeker is experiencing. It will be interesting to see how Lachute handles it. Should they send another axle-back, will there be more fitment issues?

Trickster said:
Turbo to NA difference?
I am assuming.
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Reading Corksport's disclaimer I would say that it does not matter whether the CX-50 is a turbo or NA. Copied and pasted right from their site:

In our testing, we have found that Mazda allowed some OEM manufacturing inconsistencies of the OEM exhaust components. As such, the OEM exhaust from one CX50 may or may not fit correctly on another CX50 and vice-versa.
  • Due to Mazda's inconsistencies between vehicles; this may result in slight axle back and tip misalignment on some vehicles. Function, noise, reliability, etc. are not affected and as a result, returns will not be accepted.
 
#22 ·
So the exact same vehicles from the factory will have a small variation in exhaust plumbing size and placement?
To me it’s odd that it can occur considering it’s not a custom build whereas the parts and mounts should be identical.
But it is possible I suppose and probably not isolated to Mazda.
 
#23 ·
Trickster said:
So the exact same vehicles from the factory will have a small variation in exhaust plumbing size and placement?
To me it’s odd that it can occur considering it’s not a custom build whereas the parts and mounts should be identical.
But it is possible I suppose and probably not isolated to Mazda.
Click to expand...
The exhaust components are bent and welded structures that have some dimensional tolerance. When several parts, especially long ones like exhaust pipes, run to the high or low end of an acceptable tolerance range, you end up with what is called ‘tolerance stackup’ and the assembled component can start to have fit issues. Normally some parts may run a little plus, others a little minus, and it all works out for an assembly to fit acceptably. But, sometimes a batch of parts may all run to the plus or to the minus, and you end up with an assembly with borderline to poor fit. The cure is to tightnen up the component tolerances (and incur increased cost) or to build in adjustability so the tolerance stackup does not matter as much. You see this sort of phenomena with panel gaps. Larger gaps can occur because the supporting structure has variation even if the panels themselves are all exactly to a target dimension. I’m speaking generally here…..not sure if this is what is going on with tail pipe fitment.

The Lachute axle back I installed on the -50 turbo fits perfectly but you cannot deduce that anybody else’s fit issues are due to the axle back unit’s own dimensional variation, some variation in the other parts of the car, or a little of both. Sorry if all of that was somewhat obvious but thought it might help.
 
#24 ·
Goalseeker said:
Installed today, not worth the money as the system does not fit properly. There is only rotation adjustment on the one side and the exhaust tips are not evenly distanced from the valence. Not sure how they managed to not get this correct as I used to do this work and my jig was from the original flange to tip so the system would align perfectly. I will post some pics and a sound clip, but overall I will now have to decide whether or not to spend more money to have the fit corrected, or just have this new system sit in my garage. I highly recommend you seek another exhaust if you are going to go down this path.
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Apparently Corksport had the same issue. But, are working on it
 
#25 ·
Trickster said:
So the exact same vehicles from the factory will have a small variation in exhaust plumbing size and placement?
To me it’s odd that it can occur considering it’s not a custom build whereas the parts and mounts should be identical.
But it is possible I suppose and probably not isolated to Mazda.
Click to expand...
I had a mazda 6 gt wagon few years ago. Installed all the mazdaspeed parts Inc exhaust. That exhaust didn't line up either. Took some gental persuasion
 
#26 ·
Dpuck said:
I also installed the LP Aveture/Lachute axle back on my TPP one week ago. The fit was perfect, install could not be much easier (two bolts). Only one hanger on each side is used unlike stock which hangs from 2 points on each side - but the stock muffler is much larger and heavier. There is no way to confuse which hangers to use.

As for sound, well, right out of the box is was not good. Boomy with drone between 2000 and 2800. But every time I drive it the sound gets better, more mellow, less drone, maybe a little louder in a good way. 7 days in now and this is the first day I sort-of liked the sound but it keeps improving. I suppose it is the glass pack break-in period which I read is around 1000 miles ( I have about 250 miles on it). Break-in will depend on how you drive and how many cold/hot/cold cycles.
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Do you mind attaching a sound clip to this thread? Maybe one for cold start, another from inside the vehicle and if you have a chance, from the rear end? I am almost sold, but afraid it will be not neighbor friendly. Thanks
 
#27 ·
Dpuck said:
The exhaust components are bent and welded structures that have some dimensional tolerance. When several parts, especially long ones like exhaust pipes, run to the high or low end of an acceptable tolerance range, you end up with what is called ‘tolerance stackup’ and the assembled component can start to have fit issues. Normally some parts may run a little plus, others a little minus, and it all works out for an assembly to fit acceptably. But, sometimes a batch of parts may all run to the plus or to the minus, and you end up with an assembly with borderline to poor fit. The cure is to tightnen up the component tolerances (and incur increased cost) or to build in adjustability so the tolerance stackup does not matter as much. You see this sort of phenomena with panel gaps. Larger gaps can occur because the supporting structure has variation even if the panels themselves are all exactly to a target dimension. I’m speaking generally here…..not sure if this is what is going on with tail pipe fitment.

The Lachute axle back I installed on the -50 turbo fits perfectly but you cannot deduce that anybody else’s fit issues are due to the axle back unit’s own dimensional variation, some variation in the other parts of the car, or a little of both. Sorry if all of that was somewhat obvious but thought it might help.
Click to expand...
Thanks for the explanation in detail……BUT the issue with the Lachute is the difference at the tips as they protrude from the rear valance.
Having removed the OEM 3 times in my since departed CX 30, my wife’s 3 and now my 50, the single mount point of the axleback should IMO have the same finishing point on both sides if the Lachute was equal in length? Yes? No?
The Magnaflow fit perfect on the CX 30 and the 3 as it was symmetrical….so….?
 
#28 ·
So, I actually ran into this issue recently. I purchased some bolt-on exhaust tips from Mikstore that slide over the stock exhaust tips. To my surprise, one of the tips was sticking out a tad farther than the other even though I installed them both in the same position. I ended up not liking how they looked and took them off, $100 loss/mistake but oh well.
 
#32 ·

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#33 ·
Seeing as those tips have set screws, were they evenly tightened the same way on both sides?
Did the OEM tips look normal?
Have you tried swapping the new tips from side to side to see if it is actually the way the tips were manufactured?
 
#34 ·
Trickster said:
Seeing as those tips have set screws, were they evenly tightened the same way on both sides?
Did the OEM tips look normal?
Have you tried swapping the new tips from side to side to see if it is actually the way the tips were manufactured?
Click to expand...
If you look at his pics, you can see the add-on tips are mounted the same on both side wrt to the factory tips. So, it's the exhaust assembly that's misaligned.

I went out to look at the factory exhaust on my TPP, and I can see that the driver-side tip is marginally further out than the passenger side as well. Though in my case it's barely 1/8 of an inch, so not nearly as noticeable. Also, on my car at least, the tips are tucked further back inside the edges of the bumper cutouts, so you have to look pretty closely to see it.
 
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