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Discussion Starter #1
For the past 2 months my car has been the test mule for midpipes with high flow cats. Sensors were turned all the way down and the cats were put through a lot of abuse with 2.85 pulley, 1000cc injectors, intake etc. in an effort to break them and the cats have performed flawlessly. Even after multiple and repeated back to back 45-150+ pulls the car hasn't pulled timing or lost power due to cat overheat. This week gets meth injection (tuned on injector pulse), 105mm throttle body and a prototype oversize snout (not ported but an actual oversize cast piece from a well known supercharger manufacturer). Ultimately I will be going catless but these pipes have significant hp and torque gains and are perfect for anyone wanting to exploit the full potential of their Hellcat without the smell associated with catless pipes. Can't wait to get her back this weekend and feel the difference as I try to break into the 5's 60-130
 

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Which high flow cats? There are several available. To my knowledge, only the Kooks green cats are strong enough for our cars.
 

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Discussion Starter #6
They are a new prototype.. after testing on my car, they went into production a couple of weeks ago.
 

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Got pictures of the honey comb after all that abuse?
Its a fake temp (calculated), no egt sensors btw. The problem is they melt and blow apart at high temps.
 

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Got pictures of the honey comb after all that abuse?
Its a fake temp (calculated), no egt sensors btw. The problem is they melt and blow apart at high temps.
Not the Kooks green cats but I agree all others have had that problem.
 

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Discussion Starter #10
I'm/ we are aware of the usual issues.. that's why these pipes were developed, to stand up to the abuse of a modified Hellcat. They are welded in and stood up to everything thrown at them. They will stay on for another few weeks with the additional mods being added as we speak. They're not cheap (approx $1500). I'll get more info from the tuner/developer .
 

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Discussion Starter #12 (Edited)
1500 for high flow cats :oops: I'll deal with noise from cat deletes!
It's nothing to do with noise, it's to do with being able to run high hp and not having the engine go into cool-down and yet retain cats for the smell. High flow cats also offer better torque gains over catless. Also, they are complete midpipes, not bolt-on cats.
 

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Cool, I don't know what number "high horsepower" is, but my 950rwhp s550 mustang ran just fine without cats lol. To each their own, ill spend that money on something else though :)
 

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Discussion Starter #15
So here's the info to date. On a stock car with just a tune, they made the same increase as cat delete pipes, 50whp. They are spiral cats, bonded to the shell so the can't/won't come apart. I've got no dog in this fight, just passing along info to those that may be looking for an alternative to catless and the smell and yet still have all the benefits of being catless. Oh, and I would consider anything over 700whp on a heartbreaker Mustang dyno "high horsepower"... Dynojet is for those that just want a sheet to wave around. 🤣
 

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Thats going to be a really hard sell at that price. Kooks green cats are expensive too though but already proven.

Thats going to be a really hard sell at that price. Kooks green cats are expensive too though but already proven.

You also need Kooks headers to run those pipes.
 

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I am running these with 2.85 Litens and Demon Injectors, no problems so far.


3" Twisted Steel Connection Pipes; Street Series


48-32015-YC


Dodge Challenger/Charger Hellcat 15-20 SRT-8 V8-6.2L (sc) / 392 V8-6.4L

Part Number: 48-32015-YC

$1,271.55

$1,049.03

MSRP: $1,513.75

As low as $88/mo with Affirm. Learn more




3" Twisted Steel Connection Pipes; Street Series

3" Twisted Steel Connection Pipes; Race Series









Have Questions? 951-493-7155
Details:
  • Incorporates High-Flow, 200 Cell Metallic Catalytic Converters for Improved Flow
  • Constructed from 3" Mandrel-Bent 304 Stainless Steel Tubing
  • 3/8" Thick Head Flanges
  • 2-3/4" Outlets Connect Directly to OE or aFe Exhaust
  • Heavy-Duty Flanges and OE-Style Gaskets are Used to Maintain a Leak-Free Seal
  • Optimized Tube Lengths Improve Flow and Performance
  • 2 lbs. Lighter than OE System
  • MIG-Welded Construction Ensures Optimal Strength and Durability
Read More






Dual High-Flow Catalytic Converters:
This system utilizes a 200 CPSI (cell per square inch) metallic high flow catalytic converters for maximum flow.
Construction:
Constructed of mandrel-bent 3" 304 stainless steel piping to reduce back pressure and improve flow.
Factory Mounting Locations:
3" diameter connection pipes mount directly to OE mounting locations
Leak-Free Seal:
High quality OE style flanges and band clamps are used for a complete 360 degree sealing surface.
Hassle-Free Installation:
The performance connection pipes are designed to fit in the stock location with an included extension pipe which allows this system to fit without modification. This system incorporates OE style hangers, flanges and includes O2 extensions for a hassle-free installation.
Also Fits:
2015-2019 Dodge Challenger SRT 392 V8-6.4L HEMI
2015-2019 Dodge Charger SRT 392 V8-6.4L HEMI
 
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So here's the info to date. On a stock car with just a tune, they made the same increase as cat delete pipes, 50whp. They are spiral cats, bonded to the shell so the can't/won't come apart. I've got no dog in this fight, just passing along info to those that may be looking for an alternative to catless and the smell and yet still have all the benefits of being catless. Oh, and I would consider anything over 700whp on a heartbreaker Mustang dyno "high horsepower"... Dynojet is for those that just want a sheet to wave around. 🤣
For sure man, and I wasn't directing my comment at you lol, it was a "thats too rich for my blood". How much does a tune alone make? I thiugh it averaged around 35whp for a 93 tune? Making total gain of cat delet 15rwhp
 
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