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It is beautiful, but for $999.99 and only 6hp, I think I will have to pass. Plus, this car does not need to be loud IMHO. It just doesn't fit it's gentlemanly character. If there were more of a gain I might consider, but it's just too expensive.

https://corksport.com/2018-mazda-6-2.5l-turbo-cat-back-exhaust-clone.html
Beauty and value is in the eye and ear of the beholder. Personally, though the gentlemanly Maz6 2.5t character is referenced, I would like to hear a bit of growl and snarl without the, uhh, 'ricer' in your face fartcan obnoxiousness that many aftermkt systems exhibit. IF they have achieved that (hard to demonstrate in a video); I'd sure be interested, considering the little that's out there and the R&D that does into something like this with a minimal rate of return (ie sales volume). The materials and workmanship (and those glorious, beautiful TIG welds) do command somewhat of a premium, too. $999 for 6hp- if that's the way one looks at it (I'm looking more for a sound improvement itself), is nothing in compared to many systems...be glad it isn't a 911 that this is priced for. Woooowee!

Everybody's different, and I'm glad Corksport stepped up to the plate. FWIW I emailed Tanabe a second time to see if they had anything cooking....still no response. So bravo and thank you, Corksport.

:grin2:
 

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Hundred bucks in metal TIG welded together and chromed, that's a great way to make sure you get all your R&D money back, 1000% markup!!!
 

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While I understand the quality argument, I still think the cost is way too high. Don't get me wrong, I've bought their exhausts before and I like them, and they're not too loud, but what I'm looking at is cost versus gains. You really you don't gain a lot of positivity in the sound if anyting like the experience of my CX-3 with its recent corksport exhaust is anything to go by, as it was not much more agressive than stock, and with only 6hp gain, that could be made by eliminating the second cat on the stock exhaust. The only real gains will probably come with a downpipe replacement. Then the larger exhaust might be worth it. You also might end up with a ricey sounding Mazda 6 if the mufflers don't do their job right.

Corksport uses top quality materials with 304 stainless in their exhaust, but 409 would do just fine. 304 is actually overkill considering you don't see the exhaust once you get it up in there. Unless you're really looking for the mufflers you're not going to see it other than the tips. 409 would get the cost to a reasonable level. But still... 6hp... Yes you could say that this could be an exhaust system you could build up on with more mods in the future, but let's be honest how many mods do you think are really going to be made for the current Mazda 6 considering they don't have a Mazdaspeed version that would really get the market going?

$999.99 would be better spent on a good set of tires to replace the crappy ones that come on it, or set aside for the turbo inlet pipe that they will be coming out with soon and a tune once one is finally offered by DRTuned.

I not bashing Corksport. I never would since I have only had good experiences with them. I am just disappointed mostly in the lack of gains which really isn't their fault. Now we know what an exhaust offers in hp... Not enough to justify the cost right now.

It is beautiful, but for $999.99 and only 6hp, I think I will have to pass. Plus, this car does not need to be loud IMHO. It just doesn't fit it's gentlemanly character. If there were more of a gain I might consider, but it's just too expensive.

https://corksport.com/2018-mazda-6-2.5l-turbo-cat-back-exhaust-clone.html
Beauty and value is in the eye and ear of the beholder. Personally, though the gentlemanly Maz6 2.5t character is referenced, I would like to hear a bit of growl and snarl without the, uhh, 'ricer' in your face fartcan obnoxiousness that many aftermkt systems exhibit. IF they have achieved that (hard to demonstrate in a video); I'd sure be interested, considering the little that's out there and the R&D that does into something like this with a minimal rate of return (ie sales volume). The materials and workmanship (and those glorious, beautiful TIG welds) do command somewhat of a premium, too. $999 for 6hp- if that's the way one looks at it (I'm looking more for a sound improvement itself), is nothing in compared to many systems...be glad it isn't a 911 that this is priced for. Woooowee!

Everybody's different, and I'm glad Corksport stepped up to the plate. FWIW I emailed Tanabe a second time to see if they had anything cooking....still no response. So bravo and thank you, Corksport.

<img src="http://forum.mazda6club.com/images/Mazda6Club_2014/smilies/tango_face_grin.png" border="0" alt="" title="Big Grin" class="inlineimg" />
 

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Yeah I'll pass. They also mentioned that the exhaust produces some vibrations. This is not what this car is about. It's about refinement and easy power.

One thing I noticed in their video is the powerband. I think the day someone releases a tune for this car is when we will see some meaningful gains. The stock ECU agressively reduces boost pressure as you go up the rpms, and that is why the power and torque taper off so much. If boost can be maintained all the way to redline and even slightly increased, I suspect it will make a lot more power. I am guestimating about 35-50whp. Then the exhaust would make sense...
 

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Personally, any axleback exhaust replacement on the Maz 6 would be the last on my list, No matter what the cost. Having said that, I would like the option of a bit more growl and snarl without obnoxiousness, but that would be the last thing I'd spend money on, no matter what the price of the system.

There are some other things available right now that can be done to the car overall, to bring the best out of it. Regarding engine performance, Unless one is going with a catback (and low restriction cats or downpipes) with a tune the gains to be had in performance with the exhaust replacement are minimal. Sound would be the stronger motivator here. Cliff I too hope someone brings a good tune out for this as someone had described it that the way the car is right now, the engine pretty much has a truck/SUV tune. IMO not optimal for the sedan. The engine has so much more to safely offer, IMO.

As far as price, they likely anticipate they will sell few ...as this is a niche sedan. So vote with your wallet. If nobody buys them at this price they will either lower the price, or stop offering the pipes.
 

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Could be worse. I had a 2008 Pontiac G8 that got rear-ended a few years back. Body shop said the OEM mufflers alone were $900 each x 2 for the dual exhaust system. They said if i wanted the OEM parts on the car, the costs of the exhaust parts put it over the threshold for totaling the car. If I got an aftermarket exhaust for a more reasonable price, I could have gotten it fixed under the cut-off for a total loss. Body shop wasn't sure if the insurance company would accept aftermarket parts as part of the repair work, though.
 

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Could be worse. I had a 2008 Pontiac G8 that got rear-ended a few years back. Body shop said the OEM mufflers alone were $900 each x 2 for the dual exhaust system. They said if i wanted the OEM parts on the car, the costs of the exhaust parts put it over the threshold for totaling the car. If I got an aftermarket exhaust for a more reasonable price, I could have gotten it fixed under the cut-off for a total loss. Body shop wasn't sure if the insurance company would accept aftermarket parts as part of the repair work, though.
Excellent objective post. Nobody is "wrong" here. It's all about what someone is comfortable with spending....and hey, I'll take that Corksport system for 999 any day vs one $900 OEM muffler for that G8 (and two at twice the price).
 

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Well, let's be honest here, the G8 parts are so expensive because it's a car no longer produced and even when it was, it was sourced in Australia. To make matters worse now, the Holden plant is closed though I'm sure that wasn't the case back when this happened to you. Getting one of the new SS's in a wreck can be almost as bad as a Tesla in how much time the car will spend sitting in the shop waiting for parts to arrive for repair.


As for the tuning hopes, I'm more reserved. Is the tune forcing the turbo to reduce boost through the RPM range (why?) or is the turbo simply not capably of providing a 2.5L engine with enough to maintain boost at the higher RPMs? I lean towards this as the cause since a known goal from Mazda was to spool the turbo quickly at very low RPMs. One of the key steps in doing that would be to use a smaller turbo which can spool faster. The trade off is a lack of top end which matches the characteristics of the 2.5T perfectly.


Would a tune gain? Yeah, sure, but I don't think it would be as much as people hope. Likely tunes would just push the turbo to the edge of usefulness as it turns into too much of a heat source to provide any more benefit from being overspun. This is fine I guess but will reduce the life of the turbo significantly and will make back to back runs fall off fast with heat/knock problems.


Maybe I'm completely wrong and the turbo is big enough to push 17+ PSI at redline but if that was the case, it would require some strange decision making on Mazdas part in the selection of turbo.
 

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I think I’ll wait until a downpipe comes out for it. That was my biggest gain on my mk7 gti with proper tuning of course.
 
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