Cazten

For those who have A/B’d similar designs on this car or another do you notice any significant differences between the exhaust tone for different materials?

I hear often that Inconel has a higher pitch wail to it but I’ve not seen that captured super well in videos. Assuming similar x-Pipe designs is it really noticeable?

2PUTT

very very noticeable to your pockets.

Cazten

LOL. This is why I’m asking before I purchase! Inconel is pricey…..

jake18

I will put on my materials science engineering hat to shed some light. One has to look at the materials resonance frequency to draw some conclusion. Resonance frequency is a function of the material’s elasticity and density.

Stainless steel 303 has a resonance frequency of 260Hz
Ti has a resonance frequency of 256Hz &1,630Hz
Inconel 625 has a resonance frequency of 260Hz & 1,400Hz

With the geometry of the part being the same, one would infer that Ti and Inconel will sound the about the same, loud and long.

ltfl09

If you're wondering about Inconel go with Kline - I have a video on Youtube. The other brands feed you the BS saying inconel is expensive and are charging way more than they should. I don't blame them, they're trying to make money but it's whatever..

douriel

Fascinating, and love the technical explanation of the differences. I'm curious how/why Titanium and Inconel has two levels of frequencies. What are the implications for this, and can anyone explain the difference in tone by having such a high frequency tone in comparison to SS?

For anyone who is complaining about costs of these systems (I know not many are!), I think the best way to think about it is in comparison to a high end bike. As a cyclist, and comparing to a titanium or carbon frame, it is much easier to digest!

dnimi123

I have the Kline cat-back in Inconel and it is absolutely amazing - the perfect pitch/tone for the GT4/Spyder. Not too loud and Im considering down the road adding the 200 cell cat headers (with an ECU tune). I think anyway that you go (Just OAP, headers and stock rear or full system...) you cant help but improve the sound of the car as well as a bump in performance. It really changes the experience of driving the cars for the better. That said you can live happily with the stock system as it does get better the longer you drive it and its not a bad compromise.

dnimi123

check out my IG dnimi123 and I post a few kline inconel runs. I think you can hear a big difference!

pdxmotorhead

I put a titanium exhaust on my Ktm 950,, it sings.. not obnoxious but has this cool mid range vibe that carries..

manifold danger

Reviving an old thread because it doesn't appear to have a full resolution. So the resonating frequencies are different... still doesn't justify the tremendous leap in price. I also get that it's used in F1 and aerospace... if I was competing in F1 or planning to fly in my car that would be significant. I'm clearly not doing either.

So please someone explain to me why I should consider buying the Kline inconel system aside from bragging rights? Because short of someone allowing me to drive both back to back, these two YouTube videos are all I have to go off of. They both sound eye-wateringly good. I can't tell the difference, let alone a 2x difference...

GrantG

Inconel is lighter than SS and stronger than Ti (more heat resistant). If weight loss is not a goal, SS is a good choice.

dmboone25

I am going to try really hard to listen to some of the different options before I do anything - the YouTube videos are helpful, but the mic can never replicate what it's like in person.

From everything that folks have said on here, it's my understanding that the inconel is just a bit more higher pitched, and a bit lighter as well. I am not sure whether that delta will be worth it for me, but I really hope I can hear one eventually.

Jeff Jones

It’s fun to run across my crappy video embedded in another thread 😂. I absolutely love my SS Kline setup and highly recommend it. Especially when paired with the Cargraphic valve controller. I made that video before I had the controller so now I get an even better sound in sport below 5k. I need to make an updated video soon.

The Inconel is certainly lighter and may sound different/better, but the SS sounds incredible and is much less expensive. I couldn’t justify the price difference personally and I’m usually good at enabling my own bad financial decisions.

I had my car out for the first track day of the season with PCA and it sounded fantastic…lots of comments on the sound. Again, I’m 100% sure Inconel sounds as good or better, but I didn’t think the ROI was there for me.

Jeff

Spyder Bite

Kline Inconel with Cargraphic Controller. This was during breakin so RPMs where kept lower. 6k-8k is eargasmic

ltfl09

coming from someone who has the Kline inconel oap + rear with stock headers and my SIL who has the Kline SS with kline headers. They are very similar - however the inconel has a slightly higher wail pitch at the higher RPM's and at the 5k rpm threshold when revving. Either way is a great choice. It essentially has a more hollow sound