Cat Headers are so bad?
Thread Starter
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Intermediate
Joined: Oct 2007
Posts: 38
Likes: 0
Cat Headers are so bad?
Hi you all!!!
Are the catalyzed headers so restrictives with the air flow of the exhausts?
Should I change them on a RKC 2012 to get good power, sound and less heat?
Or I can just change mufflers, air filter and tune?
Thanks!!!
Are the catalyzed headers so restrictives with the air flow of the exhausts?
Should I change them on a RKC 2012 to get good power, sound and less heat?
Or I can just change mufflers, air filter and tune?
Thanks!!!
Novice
Joined: Jul 2011
Posts: 23
Likes: 0
From: Indianapolis
I think the cat in the headers are a big part of the heat and they are also restrictive. I think I read it on this forum somewhere. "It plugs up the pipe like a tampon for an elephant". If you do a package like FullSac and others advertise, you get a pretty good price that fixes all of the issues at once.
Road Warrior
Joined: Aug 2010
Posts: 1,268
Likes: 8
From: Detroit, the asshole of America
There are threads about this approximately every 3 days.
On a bike with mild bolt-ons, it reduces sound slightly and does generate extra heat. A tune can lower the cat temp without removal. Cutting out the cat from the stock head pipe is worth nothing for peak power, but swapping to an x-pipe like what you can get from Fullsac, Fuel Moto, or Vance & Hines will improve power slightly. It isn't that significant, though.
On a bike with mild bolt-ons, it reduces sound slightly and does generate extra heat. A tune can lower the cat temp without removal. Cutting out the cat from the stock head pipe is worth nothing for peak power, but swapping to an x-pipe like what you can get from Fullsac, Fuel Moto, or Vance & Hines will improve power slightly. It isn't that significant, though.
Extreme HDF Member
Joined: Dec 2007
Posts: 13,402
Likes: 941
From: Illinois
The HD cats are exceptionally free flowing. Not like car cats made with thick honeycombed ceramic material. They are very thin coated corrugated metal that take up less than 10% of the container volume.
You will not notice the difference. Removing them will eliminate the very high temp that they function with. That is reason enough to remove them. Unless you love gold and blue pipes and mufflers.
You will not notice the difference. Removing them will eliminate the very high temp that they function with. That is reason enough to remove them. Unless you love gold and blue pipes and mufflers.
Supporter
Joined: Aug 2008
Posts: 5,189
Likes: 16
From: N.E. Wisconsin
There are threads about this approximately every 3 days.
On a bike with mild bolt-ons, it reduces sound slightly and does generate extra heat. A tune can lower the cat temp without removal. Cutting out the cat from the stock head pipe is worth nothing for peak power, but swapping to an x-pipe like what you can get from Fullsac, Fuel Moto, or Vance & Hines will improve power slightly. It isn't that significant, though.
On a bike with mild bolt-ons, it reduces sound slightly and does generate extra heat. A tune can lower the cat temp without removal. Cutting out the cat from the stock head pipe is worth nothing for peak power, but swapping to an x-pipe like what you can get from Fullsac, Fuel Moto, or Vance & Hines will improve power slightly. It isn't that significant, though.
Outstanding HDF Member
Joined: Oct 2007
Posts: 3,437
Likes: 15
The HD cats are exceptionally free flowing. Not like car cats made with thick honeycombed ceramic material. They are very thin coated corrugated metal that take up less than 10% of the container volume.
You will not notice the difference. Removing them will eliminate the very high temp that they function with. That is reason enough to remove them. Unless you love gold and blue pipes and mufflers.
You will not notice the difference. Removing them will eliminate the very high temp that they function with. That is reason enough to remove them. Unless you love gold and blue pipes and mufflers.
Road Master
Joined: Jun 2006
Posts: 812
Likes: 0
From: Jaw-Jaw (Near The BIG Chicken!)
Question all the posts here you want, but believe they generate LOTS of HEAT! Mine's gone and the heat was just one of the benefits of removing the CAT.
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Stellar HDF Member
Joined: Aug 2008
Posts: 2,404
Likes: 11
From: Southern Nevada (Pahrump)
With the CAT removed they let the exhaust flow less restrictive & the sound difference is significantly better at least with aftermarket slip ons. I'm running the V&H Hi Flows & so is my brother & my 08 with NO-CAT is significantly louder than my brothers RG with the same mufflers. That alone tells me it is restrictive....
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