cats or no cats?
- Thread starter seanx
- Start date
KNG SNKE
Enthusiast
It's all personal preference. Remove them and flow some air.
99 R/T 10
Enthusiast
Do not use the stock cats with a Paxton. If you can get by without them, do it. Better flow, louder and more HP.
Or get some high flows if you must.
Or get some high flows if you must.
99 R/T 10
Enthusiast
I think they can be programed out right from your PCM. Call Dan at DC Performce tomorrow. 
Not necessarily a good idea. We have installed well over 200 Paxtons, and you need to chat with Mark Jorgensen prior to removing the cats. There are some distinct disadvantages to removing them and I am sure Mark would be happy to advise you.
He can be reached at 1-800-889-1893
[email protected]
He can be reached at 1-800-889-1893
[email protected]
Paul Hawker
Enthusiast
Consider keeping the cats and going to a Corsa exhaust that eliminates the cross over behind your seats.
Will be plenty loud, flow better and not have too much drone.
Catless cars stink.
Will be plenty loud, flow better and not have too much drone.
Catless cars stink.
Not a fan of catless for several SEARCHABLE reasons in 25+ threads just like this one. Some reasons:
Flames
Backfire
~Obnoxious-ratty sidepipes loud
Stinky hair and clothes
N/A loss of torque
8.0+ L of poisoned air / 2 RPM.
Flames
Backfire
~Obnoxious-ratty sidepipes loud
Stinky hair and clothes
N/A loss of torque
8.0+ L of poisoned air / 2 RPM.
Removing the cats is against the law and bad for the environment. For race use there are some advantages. You will need a new computer calibration as this will change the fuel requirements of the engine.
Fatboy 18
Enthusiast
A couple of those are my reasons FOR removing the cats....
Thats a great pic 
My old Cobra used to do that, it would scare the hell out of other car drivers when I was down shifting on the Freeways, especially at night
400bhp V8 Straight through side exit exhaust and very little side absorption baffles Best sound ever Yes, agree with Jon, there are many threads on this same subject.
But, since asked again, the question then becomes are there any advantages to catless vs. a good hi-flow cat like Roe, Random Tech or Belanger.
This answer is colored highly by how you plan to use the car - track only vs. street track. If using on the street, not sure I understand the need to go catless...just my personal opinion for the many reasons outlined above.
But, since asked again, the question then becomes are there any advantages to catless vs. a good hi-flow cat like Roe, Random Tech or Belanger.
This answer is colored highly by how you plan to use the car - track only vs. street track. If using on the street, not sure I understand the need to go catless...just my personal opinion for the many reasons outlined above.
georgethedog
Enthusiast
Easy answer: Random Tech high flow cats and Corsa exhaust. Legal, loud enough, great airflow, and no need to bypass the sensor issue. If you want even better flow, get some headers. Call JonB at Parts Rack. He can set you up and give you the specifics if you have any questions.
MTGTS
Enthusiast
Mamba52
Enthusiast
Just finished this mod and no longer need my leaf blower
I absolutley LOVE that real-world answer! Visible Hi-Flow results.
The end result is immediately noticable via the "Pants Leg Dyno" which flaps your pants legs like a flag in a gale. And if you blip the throttle as you come down your driveway, or a country/neighborhood lane, You'll clear the leaves in a spriral-curling wave! (in my case Pine Needles/Cones)
the SHF metal Honeycombs will flow almost as much CFM as open pipe.
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