Originally Posted by RoadrunnerGTS

I replaced the Soul R-OAP's with the Kline SS OAP + section today on my CGTS. I have a VC. Just taken it for a hard fast run for 150kms.

From startup can immediately tell its a different tone. I can see why some may find it too quiet in lower revs. I agree it could be quieter than OEM < 4000RPM with VC closed. The tone is so clear and smooth though with valves open or closed.

Was it worth upgrading from ROAPs to the Kilne? Not sure worth the $ for me personally as the ROAP is great bang-4-buck. That said, I do love the note of the Kline and it likely improve further with some miles. I think if I had gone directly from OEM to Kline I would have been more blown away with the transformation in sound. Perhaps for me the ROAPs gave me 70% of what I was looking for, whilst the Kline gives me 85%

Below summary may help some owners make decisions:
Kline + VC:
- Tone is very different in all rev ranges. I like the way the tone changes and builds higher.
- Volume 6.5/10
- No drone
- Resonance is minimal resonance at 2500 VC open, but I feel that's because I am looking for it due to a previous pain point of mine

R-OAP + VC:
- Same tone as OEM, just cleaner up top.
- Volume 7/10
- No drone
- Resonance minimal at 2500 VC open. Perhaps marginally better than Kline.

OEM + VC:
- Does drone
- Volume 5/10

Originally Posted by RoadrunnerGTS

I replaced the Soul R-OAP's with the Kline SS OAP + section today on my CGTS. I have a VC. Just taken it for a hard fast run for 150kms.

From startup can immediately tell its a different tone. I can see why some may find it too quiet in lower revs. I agree it could be quieter than OEM < 4000RPM with VC closed. The tone is so clear and smooth though with valves open or closed.

Was it worth upgrading from ROAPs to the Kilne? Not sure worth the $ for me personally as the ROAP is great bang-4-buck. That said, I do love the note of the Kline and it likely improve further with some miles. I think if I had gone directly from OEM to Kline I would have been more blown away with the transformation in sound. Perhaps for me the ROAPs gave me 70% of what I was looking for, whilst the Kline gives me 85%

Below summary may help some owners make decisions:
Kline + VC:
- Tone is very different in all rev ranges. I like the way the tone changes and builds higher.
- Volume 6.5/10
- No drone
- Resonance is minimal resonance at 2500 VC open, but I feel that's because I am looking for it due to a previous pain point of mine

R-OAP + VC:
- Same tone as OEM, just cleaner up top.
- Volume 7/10
- No drone
- Resonance minimal at 2500 VC open. Perhaps marginally better than Kline.

OEM + VC:
- Does drone
- Volume 5/10

Originally Posted by dmboone25

. The inconel version is much more expensive, and rightfully so because of the cost of the materials. With that being said, I am just not convinced the experience is consummate with the price of entry.

Originally Posted by SupremePower

Although cost is subjective, the Kline Inconel is absolutely worth the $$ & we have not heard 1 negative feedback. The sound is glorious and 50% weight savings to boot.

Kline has said the optional heat shielding which you decided to add on to the entire oap & exhaust cuts the high pitch sound down quite a bit in the Inconel system.

Originally Posted by dmboone25

I think this is really great feedback, and I am basically in the same camp.

The strengths for the Kline exhaust are (in my opinion, at least) vastly improved tone, lack of drone, and slightly more volume than stock above 4K RPM

Aspects about the exhaust that I wish were "better" include more "theatre" and more volume at low revs. In my specific situation, I don't get much in the way of pops or bangs, especially upon deceleration. Given that it's not always possible to rev these cars out to 8K, the character of the exhaust in lower parts of the rev range is more important than I might have realized prior to purchase.

Additionally, and again for me personally, I am not sure the inconel was worth the cost of admission. I wish I had had the chance to listen to a SS equipped car before making my purchasing decision, and that would be my feedback for anyone considering this option. The inconel version is much more expensive, and rightfully so because of the cost of the materials. With that being said, I am just not convinced the experience is consummate with the price of entry.

Originally Posted by dmboone25

Quite true, Eric - as noted above, these are my personal opinions, so I hope they can help anyone who is considering the system. However, I think we can all agree that any cost approaching $9K is on the expensive side for these cars. Definitely subjective, but this is not a $500 redo.

An additional clarification to the thread at large - Kline did not mention, at the time I added the heat shielding, that this option could impact any of the acoustics or other aspects of the system, or how it might behave. I learned that after the system was purchased and installed on my car.

Originally Posted by RoadrunnerGTS

Anyone re-using the OEM tips have an issue with them being too lose and not tightening up? One OEM tip of mine won't tighten up sufficiently on the Kline.

Originally Posted by voods

I've ordered some SS catless kline headers to pair with my akra OAP and stock muffler. Anyone know if this setup works without droning?

Originally Posted by RoadrunnerGTS

I replaced the Soul R-OAP's with the Kline SS OAP + section today on my CGTS. I have a VC. Just taken it for a hard fast run for 150kms.

From startup can immediately tell its a different tone. I can see why some may find it too quiet in lower revs. I agree it could be quieter than OEM < 4000RPM with VC closed. The tone is so clear and smooth though with valves open or closed.

Was it worth upgrading from ROAPs to the Kilne? Not sure worth the $ for me personally as the ROAP is great bang-4-buck. That said, I do love the note of the Kline and it likely improve further with some miles. I think if I had gone directly from OEM to Kline I would have been more blown away with the transformation in sound. Perhaps for me the ROAPs gave me 70% of what I was looking for, whilst the Kline gives me 85%

Below summary may help some owners make decisions:
Kline + VC:
- Tone is very different in all rev ranges. I like the way the tone changes and builds higher.
- Volume 6.5/10
- No drone
- Resonance is minimal resonance at 2500 VC open, but I feel that's because I am looking for it due to a previous pain point of mine

R-OAP + VC:
- Same tone as OEM, just cleaner up top.
- Volume 7/10
- No drone
- Resonance minimal at 2500 VC open. Perhaps marginally better than Kline.

OEM + VC:
- Does drone
- Volume 5/10

Originally Posted by BoxKing

Thanks for this update.
I've been sitting in the waiting room, all while ordering all the "must haves" for the incoming car, with the exception of any exhaust mods. After reading this, I feel its best to hold off on Kline system until Im ready to pull the trigger on the full header back, as it doesn't sound like I'd get enough out of it vs. going with just OAP's... No valve controller, OEM back back box will be clamped to full open.

Even though the OAP/Rear box combination from Kline comes in as one of the best priced setups... I'm still finding it increasingly more difficult to turn away from the JCR back box, and or, the OAP/Back box by Kline in Inconel vs. SS.

Originally Posted by RoadrunnerGTS

Anyone re-using the OEM tips have an issue with them being too lose and not tightening up? One OEM tip of mine won't tighten up sufficiently on the Kline.

Originally Posted by RoadrunnerGTS

Only drone free setups I have experienced are ROAPs or Kline. I have tried many options and if I did it again I'd just go straight to Kline. The Kline is about quality of sound, not volume.