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Discussion Starter · #1 ·
Hello,

I need some help coming to a decision between two full exhaust systems! I am planning to install Norton's flashed ECU + velocity stacks, but am not quite willing to spend 1000USD for an akrapovic/graves/spark full system in which they recommend. My modification goals to my mostly stock Z400 (in which I primarily ride street) is to improve rideability/handling, get a modest performance increase, smooth out quirks in fueling/throttle application, and decrease weight.

I've narrowed it down to two "budget" exhausts which should still be decent quality, while being less than half the price of the "premium" options. I understand that I might fall short by 1-2HP by not going with one of Norton's recommended exhausts - but I figure the 5-600USD saved can be repurposed into more impactful performance modifications down the road.

Option 1: Delkevic w/ 14" Carbon Oval ~360USD
Option 2: Hotbodies MGP Evo 400USD (Actually dyno'd by Norton / -1.5HP at peak RPM compared to Akra/Graves/Spark)

Any opinions between the two? Alternatives? Convince me why the 1000USD exhaust is the better option?
Right now I am leaning towards the Delkevic system; as I see more reviews overall for the company and it has a decent warranty to back up it's quality. I'm not at all familiar with Hotbodies MGP Evo besides the fact Norton Motorsports has actually dyno'd it on an N400.

Thanks for reading and any advice!
-Ty
 

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Hello,

I need some help coming to a decision between two full exhaust systems! I am planning to install Norton's flashed ECU + velocity stacks, but am not quite willing to spend 1000USD for an akrapovic/graves/spark full system in which they recommend. My modification goals to my mostly stock Z400 (in which I primarily ride street) is to improve rideability/handling, get a modest performance increase, smooth out quirks in fueling/throttle application, and decrease weight.

I've narrowed it down to two "budget" exhausts which should still be decent quality, while being less than half the price of the "premium" options. I understand that I might fall short by 1-2HP by not going with one of Norton's recommended exhausts - but I figure the 5-600USD saved can be repurposed into more impactful performance modifications down the road.

Option 1: Delkevic w/ 14" Carbon Oval ~360USD
Option 2: Hotbodies MGP Evo 400USD (Actually dyno'd by Norton / -1.5HP at peak RPM compared to Akra/Graves/Spark)

Any opinions between the two? Alternatives? Convince me why the 1000USD exhaust is the better option?
Right now I am leaning towards the Delkevic system; as I see more reviews overall for the company and it has a decent warranty to back up it's quality. I'm not at all familiar with Hotbodies MGP Evo besides the fact Norton Motorsports has actually dyno'd it on an N400.

Thanks for reading and any advice!
-Ty
I have run my 2019 for a few months with a Delk header, chinesium slip on, @ b0xcrash velocity stacks and airbox, and a TST stage 2 tune.
It runs pretty well. 馃槈
Same tune and engine parts on my Jennings video, but previous to suspension mods.
Norton tune on an aRacer ECU is TBD based on my upcoming Jennings weekend.
The Delk is a great budget option for me at this point. A full Norton,TST, or Spears(with the recommended exhaust) set up is proven, and likely the better option if you are racing or concerned about the last 1-2hp.
I may buy Norton stacks yet, but I want to see how my current set up does with the Norton tune and the aRacer ECU.
I can say that I wouldn't hesitate to buy the Delk system again at this point, but I reserve the right to change my mind down the road!
If I were racing, I would buck up and spend the coin on the recommended and proven set ups.
I am playing, if you aren't playing spend the money on what has proven itself.
 

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I have had the Delkevic full system since late 2018. I got it for a very good price on Black Friday. I did the custom dyno tune, after market air filter, ECU flash by BAUCE Racing, snorkel delete, cut air box. My 400 pulls very hard, I can power wheelie in 1st gear!!! I also have the R6 throttle mod and +2 Driven rear sprocket. My only regret is I didn鈥檛 go with the shorter exhaust can. The Delkevic system has held up well, I have close to 7/k miles, mostly track miles.
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Discussion Starter · #7 ·
I have had the Delkevic full system since late 2018. I got it for a very good price on Black Friday. I did the custom dyno tune, after market air filter, ECU flash by BAUCE Racing, snorkel delete, cut air box. My 400 pulls very hard, I can power wheelie in 1st gear!!! I also have the R6 throttle mod and +2 Driven rear sprocket. My only regret is I didn鈥檛 go with the shorter exhaust can. The Delkevic system has held up well, I have close to 7/k miles, mostly track miles. View attachment 26070 View attachment 26071 View attachment 26072
Awesome! I'm planning to do most of the same mods, except of course leaning towards the Norton route for vstacks and tune. I've been trying decide between that exact 14" delk you have and the similar 8-9" version.. could you elaborate on why you would want to go shorter? I kind of want to as well, but don't want to be so loud as to attract police attention and/or annoy my neighbors during start up & ~5k rpm as I leave the neighborhood. From the reports I've seen, some are saying the 8-9" cans are too loud.
 

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Sure does, thank you!

How do you find the noise levels with the shorter can? Idle vs low rpm vs high rpm?
I find that when it first starts it鈥檚 a bit much, like wake the neighbors loud. It comes down pretty quick once the idle comes down. Low rpm it鈥檚 good sound. Mind you, I have a helmet on. Could be much louder than I give it credit for. I know my girlfriend can hear me from down the street at low rpm. I like it at high rpm. No droning. Still noticeable to everyone else though.
 

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Awesome! I'm planning to do most of the same mods, except of course leaning towards the Norton route for vstacks and tune. I've been trying decide between that exact 14" delk you have and the similar 8-9" version.. could you elaborate on why you would want to go shorter? I kind of want to as well, but don't want to be so loud as to attract police attention and/or annoy my neighbors during start up & ~5k rpm as I leave the neighborhood. From the reports I've seen, some are saying the 8-9" cans are too loud.
I like the look of the shorter can, that鈥檚 the only reason. Didn鈥檛 really consider it would be louder than the longer can. Not really concerned about the noise, track only. I leave the baffle in, supposed to make slightly more power with it in. The baffle did come off during a track day. I could tell right away, the exhaust note was definitely louder. I thought I felt a little less OOMMMPHH but it could have been my imagination. There is a tiny screw that holds it in place. By some miracle we found the baffle in the grass right next to the track! It was not damaged, I lock tight it in this time. I was prepared too go for the SHORTY 馃槑. If too much noise is a concern, go with the longer can! Definitely sounds much better than the stock!
 

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Awesome! I'm planning to do most of the same mods, except of course leaning towards the Norton route for vstacks and tune. I've been trying decide between that exact 14" delk you have and the similar 8-9" version.. could you elaborate on why you would want to go shorter? I kind of want to as well, but don't want to be so loud as to attract police attention and/or annoy my neighbors during start up & ~5k rpm as I leave the neighborhood. From the reports I've seen, some are saying the 8-9" cans are too loud.
I鈥檝e got the 14鈥 SS can on my full Delkevic system. I love it. It鈥檚 not too loud鈥-note Delkevic gives decibel levels on all their full systems with various cans on their delkevic.uk website. I鈥檓 glad it鈥檚 not any louder鈥-I made the right choice with the 14鈥.
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Delkevic full exhaust with the 13" stainless tri-oval canister. Old school look! I love it.

I have the Norton ECU flash, Norton stacks, cut airbox. Goes great! Still looks good after 2 years. The tech guys love the gold color of the headers.

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I have had the HINDLE Full for a couple years now with the dB reducer. It is light a heck and pretty rea$sonable. My N4 is track only.

The HINDLE is loud as SHJT. Way louder than my GSX-R 750 with a Yosh Ti race exhaust...not even close.
 
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