430 Kline Inconel installed on F430 — what’s next, cats?

Hey everyone,

After a long stretch of research (and a lot of help from this community), I finally went with the Inconel Kline exhaust on my F430. Just had it installed and I’m in love — huge difference coming from my previous Capristo. The F1 pitch is there now, I hear it, and I can’t stop smiling.

One thing I’m still unsure about are the headers. They’re definitely aftermarket, look like a 4-1 setup, but brand is unknown. They seem fine so I’m not planning on changing them.

So my question is: what’s the next move — cats?

The F1 sound is there, but it could be crisper. My assumption is that the stock cats are holding it back. Curious what others have tried:

• 100-cell vs 200-cell — noticeable difference in pitch/volume/rasp?
  
  
• Any brands that pair especially well with 4-1 headers + Kline?
  
  
• CEL issues — any luck with spacers or tune?
  
  
• For street use, are 100-cells too aggressive (heat/smell), or still manageable?
  

Would love to hear first-hand experiences and clips from anyone who’s dialed in this combo.

Thanks again — this community really helped me get this far!

 

i have capristo headers, cap 200 cell cats and kline muffler. the car screams. i had the CEL addressed with ECU tune by trev.

 

Kline makes some SICK Inconel headers too.

 

Personally I would say don't even bother playing with spacers. Just get the tune and be done, you won't be disappointed. I also have a feeling most people will end up saying that the cats will just make things louder, not seriously influence the note, but I could be wrong. Be prepared for the noise though with sport cats.

I run Fabspeed headers, Capristo 250 cell cats, Kline stainless, and a trev tune. Zero CEL, aallllll the power and noise.

 

Well, I’m not really looking for “Louder” at this point per se, but rather something crisper and just maybe a little more aggressive - so figured I needed some smaller cats??

 

vid?

 

Cats will make it louder.

 

I'd leave it alone. I have the Kline inconel on my 09. If you want a crisper sound, keep your stock cats, and change your headers to either Challenge headers or Tubi-Style. The 4-1 aftermarket headers sound deeper than the 4-2-1 OEM setup. If you go with Challenge headers, they have a more "hollow" sound, but are higher-pitched than 4-1 headers.

 

the no cel is because of trevs tune. never realized cap made 250 cats

 

will send on IG

 

i personally dont get the whole inconel fascination/premium.

 

Inconel looks shiny and new even after many heat cycles. It also weighs almost nothing. Inconel exhausts have thinner walls, so they also have a slightly higher pitch/tone than stainless or titanium.

 

I picked them up used off of a super cool member here on the forums (shout out to Marco!) He only put about 900 miles on them then changed stuff up. I wasn't looking for any specific cell count or brand, just couldn't pass up a great product at literally half the cost of new. And I know the lack of CEL is because of the tune, my statement might not have conveyed that properly. I was always operating along the lines of don't mess with bandaids just get the tune and not even worry about a CEL due to exhaust stuff.

As to your other comment about the Inconel craze, I'm kind of with you. I understand the weight, the thin wall effecting sound, etc. But dang it if they're not super expensive to get just a slightly different note. I'm not criticizing those who have gone the route, you do you boo, but I'm extremely happy with the noise I have with my stainless stuff.

 

Because racecar