Flowmaster Catalytic Converters
Thread Starter
Instructor
Joined: Apr 2017
Posts: 159
Likes: 57
From: Washington, IL
Flowmaster Catalytic Converters
Does anyone know if the Flowmaster Catalytic Converters are louder than the stock CC’s.
I realize from a muffler stand point, that Flowmasters are louder than stock mufflers.
I haven’t read/heard much on the subject of cc.
Thanks for any/all input.
I realize from a muffler stand point, that Flowmasters are louder than stock mufflers.
I haven’t read/heard much on the subject of cc.
Thanks for any/all input.
Le Mans Master
Joined: Aug 2017
Posts: 6,940
Likes: 1,490
From: New Jersey
If it is the high flow style, it'll probably be a little louder.
I have a magnaflow which was rated as a "high-flow direct replacement" And I ran my car with just the Y pipe for a little while then I also ran it with just the cat and honestly couldn't hear a difference. The one I have uses a fine tubular mesh, so looking down it it is almost see through. Increasing the number of tubes decreases the total pressure drop of the system. In other words you won't really be adding much restriction with the new cat. Mine was louder stock to new only because the core of the stocker spun sideways and blocked most of the flow... There may or may not be a difference.
I have a magnaflow which was rated as a "high-flow direct replacement" And I ran my car with just the Y pipe for a little while then I also ran it with just the cat and honestly couldn't hear a difference. The one I have uses a fine tubular mesh, so looking down it it is almost see through. Increasing the number of tubes decreases the total pressure drop of the system. In other words you won't really be adding much restriction with the new cat. Mine was louder stock to new only because the core of the stocker spun sideways and blocked most of the flow... There may or may not be a difference.
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Yss, it will be louder and flow much better.
I swapped my original for high flow and noticed a difference right away. My muffler guy said that new technology allows for 6x better flow with the same "scrubbing" power as the old ones.
I swapped my original for high flow and noticed a difference right away. My muffler guy said that new technology allows for 6x better flow with the same "scrubbing" power as the old ones.
Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
What brand were these and were they a direct fit? What year C4? LT1?
