Most exhausts ship within 2-4 weeks
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It’s the best, I recommend 100%
I ordered a full exhaust system for my bike on 29 December 2025. It was supposed to be my winter project. It arrived 9 February 2026, which wasn't unexpected.
I started the install late February/early March and had a serious fitment issue. The exhaust headers had flanges that are entirely too thick and I noted the nuts wouldn't thread on fully.
At the time I suspected one of the following:
1. The headers were not fully seated. (User error)
2. The flanges are incorrect for my model.
3. The headers were welded incorrectly or for the wrong model.
I opted to torque the nuts, which only threaded on between one and two turns, to 10 pound-feet. The headers did not seat any further, and the nuts only threaded on another turn or two. (The studs were not even flush with the end of the nut at this point) I stop the install, take some pictures, and send it to CS Racing customer support on March 2nd, 2026.
The next day they ask if the nuts are tightened fully to which I told them my 10 pounds-feet setting. They respond "You can tighten them more. Let's see how it sits." They didn't give a torque value. I tightened them to 20 pounds-feet which got another couple of turns. I then went to 30 pounds-feet, which bent a flange and a stud.
Again, I stop the install, take pictures, and send it to customer support. They say "We changed the flanges and we’ll ship a new set to you. Sorry about the inconvenience."
Why ship an exhaust with flanges that are not current? Why tell me to tighten them more, if you already know there was a design change to solve this issue?
I had to replace the studs and overtorqued nuts. CS Racing hasn't helped with this added cost, claiming that I shouldn't have gone so far. But they couldn't be bothered by giving me a torque value.
At this point it's March 9th, and getting into motorcycle season. Not hearing anything, I reach out on the 12th (a Thursday) to see if the flanges have been shipped. Not only have they not, but they told me they will ship on the 16th.
It takes a week to get a customer replacement parts for a manufacturer defect?
I got a shipping notice that replacement headers were shipped March 17th 2026, for a March 25th delivery. On March 22nd I got a follow-up email that the headers have not yet shipped, but was delivered on the 23rd (two weeks later). The new headers are approximately 1/8" shorter than the first set.
Once fitted with the new headers, the exhaust went together as expected. I still can't fathom why CS Racing would send out a kit with headers that were already known not to fit. This install would have been done three weeks earlier if I had the correct headers to begin with, and there wouldn't have been a risk to my engine or studs. I'm out extra cost having to replace studs, and out time having to assemble and disassemble multiple times.
Thank you for taking the time to share your experience with the CS Racing full exhaust system for your 2023 Kawasaki Z H2. We truly appreciate your feedback, and we're genuinely sorry for the frustration and extra time this caused during your install. Your satisfaction matters a lot to us, and we want to address everything you mentioned directly and transparently.
First, we want to be clear: this specific flange thickness issue was isolated to your bike. Your Z H2 was the only unit we've ever seen present this exact fitment problem with the original header flanges. As soon as we received your photos on March 2nd and understood the limited thread engagement, we immediately went to work on a solution. We designed, manufactured, and shipped a completely revised set of shorter headers (about 1/8' shorter, as you noted) that addressed the issue perfectly. These were made exclusively for your situation and arrived on March 23rd—just a few weeks after your initial contact.
We moved as quickly as possible to get the updated parts to you because we hate when any customer runs into a hiccup, especially on a premium bike like the supercharged Z H2. The revised flanges seat and thread correctly, and we're glad they resolved the fitment for you.
Regarding the support interaction: Our team saw the photos and initially suggested trying additional tightening to see how everything seated, as minor adjustments sometimes resolve minor alignment variances. In hindsight, we should have been more cautious with that advice and provided clearer guidance on torque right away, even though is available on our website.
We take product quality and customer support very seriously, and this situation has already helped us refine our pre-shipment checks and technical guidance for future Z H2 kits (and similar models). Your input is valuable, and we've used it to improve.
Again, we're sorry this took some of the enjoyment out of your install and upgrade. The CS Racing system is designed to deliver great sound, performance, and fit once properly installed, and we hope the revised headers now have you enjoying the bike the way it should be.
Ride safe and enjoy that Z H2!
Best regards,
The CS Racing Team
My 'short' advice, if you like the look of this exhaust, buy it! You won't find better. 😎
It's pretty loud without the dB killer but it sounds amazing going up through the revs then it pops and bangs a bit on the overrun!! 😁
It looks awesome, everytime I park up at a bike meet it gets attention and compliments.
I have to be honest, I was concerned buying an expensive exhaust that's manufactured in Brazil then shipped to Ireland, if there were any problems it wasn't going to be easy to fix but after looking through reviews I went ahead and ordered one, delivery took about 4-5 weeks
Honestly, the build quality is amazing and the quality of the stainless steel is VERY high standard. It was easy to fit following the easy to understand instructions.
I've used the bike regularly all through an Irish winter and the worst of it's weather and the CS racing downpipes are still as shiny as the day it was fitted. Most other bikes I've had with oem or the other usual exhaust brands, after a few weeks the downpipes get stained, they look terrible and impossible to clean.
Honestly, I can't recommend this and CS racing enough.
Great service. The package arrived in great condition.
Amazing product, high quality, outstanding support, & quick delivery!
