hollowing out cats
Junior User
Joined: Jun 2003
Posts: 91
Likes: 1
From: houston
hollowing out cats
Ive heard them before. They are louder, but in an annoying way. Like glasspacks or riceburner pipes. No class at all. If you want sound, buy a borla exhaust, if you want performance, buy a flowmaster. The only thing gutting your cats will give you is a couple hours work replacing them every time you are inspected.
New User
Joined: Nov 2003
Posts: 24
Likes: 0
phantom i think you got it mixed around FLowmaster mufflers barely flow better than stock mufflers. However Borla make the best sounding best performing muffler around. For sound go with Flowmaster... but if you want the best of both worlds go with Borla.
Elder User
Joined: Dec 2002
Posts: 608
Likes: 0
From: TAOS NM
ok now rangerfan 2.9 i'm gonna step in now!!!!
you say stock mufflers flow better than flowmaster's???????
come on na.i could ship you a stock ford truck muffler to cut open so you can see the differences on the inside...all that packing and stuff compared to flowmasters v-diflector.
come on bro don't confuse the guy, help him!
you say stock mufflers flow better than flowmaster's???????
come on na.i could ship you a stock ford truck muffler to cut open so you can see the differences on the inside...all that packing and stuff compared to flowmasters v-diflector.
come on bro don't confuse the guy, help him!
New User
Joined: Nov 2003
Posts: 24
Likes: 0
no im not saying that flowasters dont flow better than stock..what im saying is that there are plenty of mufflers out there that flow way better than flowmasters. Dont get me wrong i love flowmasters i have one on my 90 ford ranger 2.9l and it sounds great for a v6...nice and rumbly. however for example glasspacks are a way better performing muffler than flowmaster. However i dont like them since my engine is a v6. I feel flowmaster should be sued for false advertising since they claim that there muffler is such a free flowing muffler when actually they are quite restrictive. If you want sound GO WITH FLOWMASTER if you want performance go with Glasspacks or any kind of Borla exhaust just to name few.
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Freshman User
Joined: Aug 2003
Posts: 49
Likes: 0
From: Columbus, MS
I was "forced" to hollow out my cats (hi flow) when a rich running condition and a couple of backfires started them breaking down. The cats had less than 1000 miles on them and I couldn't afford to go out and buy new ones again.
To hollow them out, I just stood them up on end and used a 4ft piece of lead pipe. Only took a few minutes.
As for legality, you already stated you know this is illegal.
As for sound, I don't like it. Sound cheap to me.
As for performance, I can't tell a difference.
As for 02 performace, not sure.
I'm just about done with all the mods I want to do with a recent engine swap. Once the swap is done, the next item to buy is new cats.
Mark
To hollow them out, I just stood them up on end and used a 4ft piece of lead pipe. Only took a few minutes.
As for legality, you already stated you know this is illegal.
As for sound, I don't like it. Sound cheap to me.
As for performance, I can't tell a difference.
As for 02 performace, not sure.
I'm just about done with all the mods I want to do with a recent engine swap. Once the swap is done, the next item to buy is new cats.
Mark
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Freshman User
Joined: Jul 2003
Posts: 27
Likes: 0
I have no cats and a Flowmaster 40 series SI/DO dumpped on my 98 F-150, and it sounds unbelieveable. I get starred at by Mustangs and Camaros. I also had to run MIL eliminators to prevent the CEL from coming on. It was worth every hour it took, i now have one of the loudest if not the loudest truck where i live. I would never go back to stock cats or high flows, high flows sound horrible.
Best Cats Are No Cats
Best Cats Are No Cats
Freshman User
Joined: Jul 2003
Posts: 27
Likes: 0
MIL eliminators stop your check engine light from coming on when you take your cats off. the only ones i know of are made for 4.6 and 5.0 mustangs, which are what im using. I dont know if they make ones for 351s. Heres a link to the ones i have:
http://www.unbridledponies.com/Merch...tegory_Code=F1
http://www.unbridledponies.com/Merch...tegory_Code=F1
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