J.Ho

I can attest to the above. The x-pipe was developed for me.. It sounded amazing except it shook the entire neighborhood on the cold start. It defintley felt like it needed backpressure of some sort and was more laggy. With just the Soul Sport Cats installed and my PSE muffler, I can feel a noticible difference and the turbo's sound more agressive and meaner.. you can hear me coming now. It's also a little more crackly in sport mode, a little more aggressive sounding, but not too much more than the normal PSE. I'm real happy with my Soul sport cats and now can say I'm "done" with my exhaust!

arter

You mentioned earlier in the tread that you warrantee the sport cats. Does this include use while tracking the car? I bring this up as myself and others have melted HJS cats during HPDE events.

arter

You mentioned earlier in the tread that you warrantee the sport cats. Does this include use while tracking the car? I bring this up as myself and others have melted HJS cats during HPDE events ( not on a 911 though).

I really liked them, more power, no smell, etc. Just afraid they wont last more than 10 track days......

Soul Performance

We offer a 3 year warranty on catalytic converters themselves.

Using leaded race fuel or any type of fuel additive voids the warranty on the catalytic converters - they simply aren't designed to withstand that abuse.

We know there are owners who don't want to run catless components yet still want to enjoy their cars on track days. We know there is the potential for catalyst failure during track use and we are prepared to support our customers and let them enjoy their components enthusiastically (and responsibly).

We will repair or replace the catalytic converters once if they fail from extreme use (internal failure). After the second failure, it is evident that the car is being used under extreme circumstances - outside of the range of life of ANY catalytic converter - and that point we will offer credit towards an equivalent catless product. We think that is more than fair without leaving our customers without a solution.

If the situation presents itself where the car is being used for double duty and significant track use (I'd consider 10 track days to be getting there)- we'll take care of customers so that they can own both street and race variants which can be swapped out akin to running more aggressive brakes and tires on track.

We hope everyone finds that fair!

-Mike in Marketing

arter

Thanks, I may give them a try again when my car gets delivered

mdrums

I've never used any type of sport cats in the past...just kept the stock cats on my cars. I've done a lot of track days in 997 cars and never an issue melting or destroying the stock cats.

So my questions are...

How are stock cats more durable than 200 cell sport cats?

What fuel additive hurts cats?

I only use 93 octane from the Shell station outside the track (Sebring) or other tracks I go to there is usually a gas station near the track. However the gas sold at my tracks is unleaded 93.

Soul Performance

Great questions! The stock cats use a much higher CPI (cells per inch) catalytic converter. While most sport cats are 200 cells, the stock cats are in the order of 600+ in most cases. That translates into a catalytic converter with a much larger surface area to handle the emissions of the combustion process making the catalytic converter more durable over a longer period of time, after all there is an 8 year warranty on factory supplied emissions equipment.

The downside of that is the greatly reduced flow and muffled sound. The 200 cell Sport Cats are a great alternative that remain emissions compliant while freeing up some great sound and power. Some owners may experience Sport Cat failure after a multitude of hard track driving due to the inability of the relatively small surface area of the 200 cell catalytic converter to handle the much higher temperatures and emissions.

Regular 93 octane fuel is just fine to use at the track with the cats. When we reference fuel additive we are speaking of octane boosters or high octane fuels like Cam2, 100 octane etc.

The reason for that is when using certain fuel additives and/or high octane fuels your EGT could spike above service levels, or they could actually wash the chemical coating off of the matrix all together.

Hope this helps.

Best,

arter

Fuel additives that hurt cats are octane enhancers that contain MTT and the like. Theyb poison the Pb/Pt so that the smell will come back ( they dont melt anything).

sport cats can have a weaker matrix than stock ( 600-800 cell) cats. The heat can cause them to melt. Correct ( larger) sizing can reduce the heat. My knowledge of sport cat issues is with cayman / GT4 header units not 911 sized ones.

(edit, didnt see the Soul answer when I wrote this, but agree)

Soul Performance

That is why we use the larger "911" sized cats on all of our current product offerings, including the GT4 Street Headers

Soul Performance

Thank you member "texascarlover" for ordering a set of 991.2 (with PSE) Sport Catalytic Converters! Anyone else have any additional questions I can help with?

Evan Fiorentino
Soul Performance Products
P: (267) 818-3203
E: evan@soulpp.com

johnstoy

Is SOUL looking into or planning to develop headers for the 991.2? I ask this after seeing someone else's dyne sheets: it looks like headers made a bigger power gain than the 200 cell cats (which was kind of surprising until I saw the design of the stock headers).

Just curious,
John

Soul Performance

John, thank you for asking. We do not plan on offering headers for the 991.2 in the near future. We believe that there is power to be had by increasing the efficiency of the headers as there is certainly room for improvement over the design of the 991.2 pieces. Upgraded manifolds help in the high RPM range due to their increased efficiency, but by increasing the volume inside the headers it can negatively impact spool time - and this has been brought to our attention by more than one customer / associate of ours. If we did offer headers we would consider 321 stainless as the material of choice - and that's where we'd like to be headed in the future. Changing the catalysts should increase power without negatively impacting spool as they are post turbo, power with no compromise.

Soul Performance

Fabbing up another Trackback Turbo Back Exhaust



We're considering keeping one on hand as a part of a rental program to anyone who wants to a track oriented system for a track day but can't necessarily justify having it on at all times. Pay in full and then get refunded when we receive it back. If anyone is interested let us know.

TexasPorschelover

Installed a B&W air filter and my new Soul Cats in 2018 GTS today. What a b1tch that was! Anyway I got it all done and all screws back in the same spot they came from and not one error (scratch etc.). Fired it up and it sounds much much better. Feels more ferocious! Tomorrow the Musicar tweeters go in. So far so good but I will say the install of the cats was more involved than I anticipated and certainly more so than the instructions suggest. I had to buy a number of tools and take the muffler to muffler shop to expand the openings to get the cats on. All in all rewarding but I am beat!

sticky

How much louder would you say it is? Do you feel it is aggressive enough now?

I'm pretty much going to copy you. I have the same filter.

Also going to order up those tweeters and would like to hear your feedback.