Cat Headers are so bad?
Grand HDF Member
Joined: Apr 2010
Posts: 3,590
Likes: 1,151
From: Brandon,Fl
If you ride alot in cold weather, keep the cat so you won't have to buy thermals!! It's like your motor has asthma with the cat in the pipe, I just don't buy the theory that it isn't restrictive after cutting mine out and seeing it for myself!!!
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
while I agree with you that they don't have a big effect on flowI will say they do take up a lot more then 10% of the container volume. I cut one and removed the cat material and I would estimate it was closer to 50% which still left plenty of flow. look up the header pipe and you can see exactly what the stuff looks like. When you cut the section in two you can hold it up to the light and you can see it looks like about 1/2 material 1/2 free space.
Seasoned HDF Member
Joined: Aug 2010
Posts: 5,173
Likes: 177
From: East Coast
The cat elimination made a startling difference in performance, at least as much as replacing my stock air cleaner with a stage 2 Big Sucker.
And yes, it is more restrictive than the North Korean Gov't.
And yes, it is more restrictive than the North Korean Gov't.
Grand HDF Member
Joined: Jun 2007
Posts: 4,599
Likes: 421
From: Lansing mi
I put 1000 miles on my 11 RK completely stock, even with the windshield off I could feel heat on my right leg all the time, even on the freeway. Next I put on Bassani 4" megaphones, sound was great but the heat was the same. About 1500 miles later I got a no cat 09 head pipe and a FM mapped PCV and a SE air kit. Now without the windshield I cant feel the heat unless I'm going slow in traffic, big improvement. Only down side for me anyway is with out the cat the megaphones are a lot louder, sometimes on long rides they get to be a little to loud. I don't know how much the cat restricts the air flow, but they make a big deference in the sound and the heat on the right side.
Thread
Thread Starter
Forum
Replies
Last Post
2011FXDC
Rush Racing Products
3
Oct 13, 2014 02:49 PM
