Installed the Kline Inconel exhaust including OAP and it sounds GLORIOUS! I can 100% say all the hype about it in these forums and this thread is fully warranted.

The 4.0 finally signs and hits all the right tones like a proper GT car should. What a game changer!!!

The install is very straight forward as well. Just a hair under 3 hours on jack stands.

 

So glad to read this!! Enjoy it man! 100% correct in saying its a gamer changer for this platform!

 

....aaaand now for the headers!

 

Even though videos don’t do exhaust tones any justice, its still better than nothin’… we need some vids from those who have Kline w/Headers (any brand).
I need some inspiration to pull the trigger

 

I would love to eventually get headers some day. From the clips I've seen, it definitely takes it up a notch in volume and depth.

 

Headers are very tempting, but I wouldn't tune mine to eliminate the risk of warranty denial (paid a premium for an 8 mo. old car + CPO, 5.5 years warranty). Plus, seems like there's a grey area even running 200 cell cats even without a tune, but not sure if there's enough clear data (vs. opinions) on this matter.

 

my IG Dnimi123 has both with and w/out headers. FYI headers complete the system and further reduce drone as well as add volume under 4,500 and really doesnt add much above that. Tone, pitch and sound are virtually the same with or without headers.

 

Not sure if this is music to my ears or not.. Lol. On one side, Im disappointed that the headers (in your opinion) dont add more overall volume, and on the other hand, I feel pretty damn happy to know the current Kline system was so well designed, that headers dont seem to be a “must have” unless you want to squeeze out more HP.

With regards to a tune to pair with headers, or without… Im going to take a hard pass for the moment. I’ll do headers first, which I still plan to do. In the case I suffer an engine issue after installing them, one can simply limp/tow (if needed) to their Indy shop to have the OEMs placed back on prior to taking the car in to the dealership; where a tune could be traced by digging into the ECU.

 

Nice to hear and congratulations on the upgrade. How much for the system if you don't mind? Any boominess off throttle or droning cruising at 2-3k rpms? Or CEL, rattles etc. ? How is the tone and dB? Thanks.

 

pm’d price over

 

Kline just posted this in their Instagram story. Maybe a new product being developed?

 

Headers complete the system. the biggest add for the headers is power and better volume at the lower end (drone eliminated)... headers dont seem to me to have done much for volume above 6000 RPM

 

Here is my Kline SS with VC open (short gear ratios too)

 

What more does one need? It sounds wonderful, and the change to the gearing is very clear. Were the valves held open in that video?

 

Yes, basically perfect car for me now. Gearing is massive transformation. Valves open all the time in that clip.