430 Scuderia Exhaust Manifold Debate

Having some difficulty choosing an exhaust setup for my Scuderia. I realize there are already lots of exhaust threads but I've spent a couple days searching and reading through them at this point yet still feel like I don't have a good answer regarding what's best.

Here's what I think I've decided on so far:
-Kline inconel muffler. Reason? All inconel = light and I like that it's X pipe when open and muffled when closed unlike the S-Line which is always open.
-Kline inconel 200 cell cats. Reason? 200 cell seems to be the point where you don't get a CEL. Also I don't want to make it too loud, my goal is more to change the pitch to F1-like, not make it obnoxiously loud like test pipes or 100 cell cats would/might do. Also the Kline cats are available with full inconel heat shielding.

Now here's where I have the problem, the exhaust manifold.
First off, I'm not sure how much benefit it will have on a Scuderia anyway. Most of the data I find is on regular F430s which benefit more since their manifold is worse and has restrictive pre-cats. So what gains if any can I expect from a quality manifold on the Scuderia? What effect does the manifold have on sound as well?

Secondly, I'm looking between the Kline and the Larini manifolds but I see some conflicting info, primarily around 4-1 vs 4-2-1. I'm leaning towards the Larini because it has stepped primaries and is 4-2-1 so it should have better midrange. But I see some dynos of 4-1 manifolds that don't have a midrange dip. Which is it? Pros of the Kline is that it will be lighter and more crack resistant because it's all inconel.

Lastly, on the note of how much difference the exhaust manifold makes, I attached some numbers from EVOMS. Notice on the last stage the changes are just the exhaust manifold and going from "sport" exhaust to X-pipe. So likely most of the change is the manifold. They show a 21HP increase and only 7TQ increase. The fact the HP gain is so much larger makes me think they used a 4-1 manifold. If true, I suspect going with a 4-2-1 manifold, I won't see much gain since the stock manifold is already 4-2-1 and not too terrible.

TLDR; Which manifold should I get for my Scuderia? Kline? Larini? Or is the stock already good enough that I shouldn't even bother dropping $7k on just a manifold? Does anyone have dyno results for the Kline or Larini manifolds? Thanks.
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From what I have seen, that is a good choice performance wise but the main thing keeping me away from it is there's no heat shielding. No heat shielding is a dealbreaker for me. Also it's 4-1, and I think more high rpm focused unlike the Kline which is 4-1 but blended more gradually like a 4-2-1. I really wish I had dyno results for all of these...

S-Line is a good choice. What I like about the Kline is it's identical to the S-Line when the valves are open (both are just a completely open X pipe), but quiet when closed. Only trade off is some extra weight with the Kline but not a ton since it's all inconel. Also cosmetically I like being able to see the shine of the muffler through the rear grille.

 

Supersprint, Kline, Fiammenghi all look like works of art. Issue is the Larini is really the only one mentioned so far that I feel confident it won't kill the midrange since it's 4-2-1. Capristo is the only other 4-2-1 I'm aware of but A) it's more expensive and B) I don't like the blanket style heat shielding. The collector on the Fiammenghi looks especially tuned for high RPM just looking at how sharply they all merge vs the Kline which is also 4-1 but merges more gradually almost like a 4-2-1.

Such a shame there aren't dynos for any of these, it would make the debate so much easier. Very important to me that I don't have a midrange dip, I don't want to do anything to harm the already awesome powerband the Scud has.

Capristo is 4-2-1 which is why I think it had more power for you across the whole powerband. Also you bring up another good point, what are people's opinions on tuning the ECU? Better to just let the OEM tune auto adjust or worth it to get a tune? I mildly worry about the tune decreasing reliability if they make it leaner or advance timing.

And yes the Kline definitely has an F1 sound (I recommend everyone watch gtoscud's videos on youtube of his full Kline Scud) but 90% of that is coming from the X pipe in the muffler, not the manifold. Any of these manifolds we're discussing will have an F1 sound when combined with higher flow cats and the Kline muffler/X pipe.

 

I'm using the dyno numbers as relative comparisons, not absolute. Very different things. What you're speaking about only applies to absolutes.
Since they're using the same dyno presumably, and the same correction factors, I can do this.

You could have a dyno that's extremely inaccurate and reads 600hp for a stock scud, if it then reads 620hp with a manifold change, you know the manifold added 20hp. The absolute values are wrong (600 and 620hp) buy the relative values are correct (manifold made 20HP more relative to stock)

It's like having a bathroom scale that always says you're 10lbs heavier than you actually are. It will still show if you lose or gain weight even though the actual weight is wrong.

Ferrari also has a lot different design considerations/restrictions than aftermarket engineers. Ferrari has to balance cost, mass production ability, reliability, emissions, etc. So it really shouldn't surprise anyone that aftermarket parts can make more power and be lighter since they have less design restrictions.

 

I know nobody has voted for the Larini yet but I keep finding myself leaning towards that one.

-it's 4-2-1
-has built in inconel heat shielding
-is equal length
-has stepped primaries
-visually the pipe routing looks similar-ish to capristo which has known good performance

Really the only negative is it's a little heavier than Kline and may have a slightly deeper tone because of the 4-2-1 design. But I suspect the Larini performs better than the Kline.

 

That's great info for F430 owners but unfortunately doesn't help too much for Scuderia owners like myself.
Hard to say how much of the improvement comes from the manifold design and how much comes from removing the pre-cats (which scud doesn't have)

It also unfortunately doesn't show the full curve so while we can say it increased torque at 3922rpm and 8275rpm, it may have a dip somewhere.