430 Whom makes the best F430 exhaust headers sound wise ?

Here is Capristo

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The step up in diameter is to keep velocity higher close to the port. Supersprint is renowned for their R&D, and on the cars I've had where they made a header it was always the best option for power. Not sure about sound comparisons and engine bay heat control but if I had to bet on it my money would be on them making the most power.

 

The steps are to encourage exhaust gas to flow towards the outlet. It prevents reversion as the exhaust valves change position, and the effect is a reduction in back pressure.

F1 pioneered this IIRC
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The supersprints look like a nice design. I would prefer if it wasn't a slip type collector as any tiny exhaust leak there would skew o2 sensor readings.

Overall I think the Capristo would be my choice. Looks really nice and 4-2-1

 

Agreed but they are 8G....

 

Yes the best stuff is often most expensive. That's one of the reasons I'm building headers for my 355 now.

 

whats wrong with Kline if not capristo?

 

Nothing wrong, but as @mwstewart pointed, I don't like that small radius bend on the rears. Probably makes no difference, but I just like the Fabspeed design better if I was to choose. I have still not made up my mind; I am trying to do a dyno run before I change them to see the difference.

 

Dont think you can compare kline to fabspeed. Have you seen a set of klines in the flesh?

 

No I have not... But there are pics posted in this thread, and I can see them online... Doesn't matter I do believe they are great. I just prefer the way the Fabspeed lines flow better. Once you install the inconel heat wrap on fabspeed they are actually more expensive then kline covered.

 

It uses a crush gasket like the OEM header to cat pipe connection on the 360 (430 might be the same but not sure). Nothing to worry about leaking.

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Agreed, the kinked bend on the Klines is awful. That would certainly kill flow on that cylinder.

 

Are the Tubi's not in the final cut? I thought they were pretty good, no?

 

I'll have to disagree on that one. Looks like a lot of potential for leaks and it wouldn't have to be much at all to influence fuel trims.

Not saying they -do- leak, just that it looks like they could. Doesn't appear the gaskets fit the primaries well and also held together with springs and not bolts.

 

are the OEM headers 4-2-1 ? I think they are from looking at them, but can't really tell due to the covers...

 

https://www.ferrarichat.com/forum/threads/4-1-headers-and-the-noise-they-make.607065/

 

Here is Tubi. I don't like them due to the air rail (which is blocked for 430) , so they just offer one size fits all. Plus they are inconel and again over 8G when all is said and done

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I went larini on my scud
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@mwstewart : Did you end up selling the Capristo for Supersprint? How do they compare? Thanks

 

There's nothing to disagree with, it is a proven design. Ferrari also uses this same method in a way that would disrupt O2 readings. It works.

 

Not yet, its on my list. I miss the power delivery of 4-1.

 

Yeah there is and I disagree. Having a "crush" gasket held together by springs on 8 header tubes has a potential to leak, end of story.

I'll wait for photos of oem Ferrari headers assembled in the same manner.

 

I did some looking into the supersprint collector gaskets. Here are some comments, mostly from M5 board.

"These type of collectors are common on race exhausts as they allow for expansion of the headers which extends the life of gaskests and the headers themselves. They are called expansion joints. As you are finding after many miles/heat cycles the can leak until wam; a fix is to pull off the mergers and smear a small amount of 'oxygen safe' RVT (Silicone sealer) on each header tube and each port in the merger and that should solve the problem for quiet a long time!!

If they are held on with tension springs, replace these as with heat they loose their tension and allow more movement and leaks until warm."

"Same problem but FULL SS setup...still sounds like shizzit when cold...German super sedan that sounds like some high school kid's dodge dart ticking away..."

"I've had the SS headers since new and have had to have them re-welded and adjusted at least twice and they need it again. I am getting exhaust smells in the cabin and I don't necessarily get a "flutter", but I do get a burble all the time, but I love that."

"Mine used to do it when I first got them. The gaskets in the collector were leaking. Now it doesnt happen at all....maybe they finally broke in."

"Mine does that annoying flutter on decel too. Sounds like a major exhaust leak"

"so some of you guys bought them brand new and right out of the box with new gaskets and springs you still have the noise? Im tempted to pull the collectors off and use some high temp permatex on the ends of the runners and the gaskets but i know how hard the collectors are to get off without sealant on them."

"If the donuts are bad, they'll do that. It wouldnt hurt to order a new set of those. Also, a 60lb door spring will more than do it (pretty sure thats what the ones from SS are)."

"I have this flutter from the ss headers. The flutter annoys me. I also get exhaust fumes in the cabin which is super dangerous. The ac brings the fumes in. Image Unavailable, Please Login "

And from supersprint themselves-

"where exactly do your SS headers leak? Have you checked your sealing rings/springs lately?
That usually is the only place, along with exhaust hangers, which needs some mantainance work.
Worn out seals, or missing springs, may cause an exhaust gas leak."



I can keep going.

Anyway, certainly appears there's not only a potential for leaks but that leaks do in fact occur. Not to say they -can't- be sealed in any way but seems like the donut gaskets and springs are at best a maintenance item.

 

Can you please elaborate why you miss it ? Wouldn't the Capristo excel at midrange of the RPM band ... Making the car more drive-able ?

 

Again, go inspect a Ferrari 360 header to cat pipe connection and you will see a crush gasket that doesn't leak when installed correctly. I don't care enough to find other references but I'm sure they're out there.

You can believe what you want about people using the wrong size gasket, putting them in backwards, re-using old gaskets, or not understanding how to put the joint together, but it doesn't mean you have some subtle understanding that Ferrari, Supersprint, and others do not.