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would it be ok to completley do without my cat's on my '99 Z71? does cats affect the sound level of my exhaust?
 

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is your truck obdII? i think it is in which case i would not delete the cat, the engine is made to run with a cat in place, get a high flow cat and lose the muffler if u want loud
 

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NO, it would not be ok. remove your muffler or run glasspacks if you want it loud. it will sound like absolute {expletive}, but i guess thats the trend with you kids theese days.
 

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Why not just gut the whole damn exhaust? Christ, get some aftermarket exhaust. Ever heard of Flowmaster, Magnaflow, etc. How hard is this stuff?

JW
 

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Please don't remove the Cat. It helps none with the engine, that motor will run BETTER with it on! Also, it doesnt do its job of cleaning the deadly exhaust gases before they exit the car. Get a good high flow Cat like Magnaflow, have good exhaust run, good set of headers, and a good muffler (or no muffler, whatever gets you goin). Please don't hurt the people riding behind you by flooding their car with harmful exhaust gases that are only worse when you remove the cat. Like I said, it'll also run better.
 

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and dont forget to hug a tree while your at it, save a gerbil in distress, and put all that mud on the underside of your truck right back where you found it!! :eyecrazy:
 

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Just cuz I believe in being legal, not poisoning people, and helping his truck run better? Ever worked in a shop on a truck with no cat? When you gotta breathe them in for a couple hours, then let me know how you feel about them. I just don't see the reason in removing them. It absolutely does nothing but allow you to run true straight pipes; but with no headers or other major engine mods why do it?

Like I said, with that being a newer model truck with OBDII, its going to run better WITH a catalytic converter in place. Buy a nice, high flow replacement, run your exhaust, and help everybody out. I don't see a reason, and he asked for opinions. I gave him mine. I support the sport, and I do it legally.
 

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On 2005-12-14 18:38, ZuzuGuy wrote:
Just cuz I believe in being legal, not poisoning people, and helping his truck run better? Ever worked in a shop on a truck with no cat? When you gotta breathe them in for a couple hours, then let me know how you feel about them. I just don't see the reason in removing them. It absolutely does nothing but allow you to run true straight pipes; but with no headers or other major engine mods why do it?

Like I said, with that being a newer model truck with OBDII, its going to run better WITH a catalytic converter in place. Buy a nice, high flow replacement, run your exhaust, and help everybody out. I don't see a reason, and he asked for opinions. I gave him mine. I support the sport, and I do it legally.




yes, ive worked in the shop on a vehicle without a catalytic, my truck. however, i dont breathe exhaust in for a couple hours because i have sense enough to make sure i have proper ventilation. the reason i removed mine is because it was broken and was cheaper to remove it than to replace it. not everyone can plop down $100 or more at a moments notice and a cheaper alternative is necessary. thus, the o2 simulator which cost me like $30 rather than the price of a new cat. he simply asked if he could completely do without the cat and the answer is yes. will he see any hp or torque gains, doubtful (i didnt in my experience). will it change the exhaust note, yes (mine had a little different tone and was a little bit louder which i ended up liking just fine).
 

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the reason i removed mine is because it was broken and was cheaper to remove it than to replace it. not everyone can plop down $100 or more at a moments notice and a cheaper alternative is necessary.

im no tree hugger and i have no problem with people doing what they have to do when short on money, but i dont believe this is a money issue, just a preference one, and the way i figure it why cut off the cat when its just gonna make the motor run {expletive}ty, dirty, and sound bad? not to mention having to find a source for inspection stickers, why not just remove the muffler? or get a high flow cat?
 

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On 2005-12-14 19:45, Omahastylin16 wrote:


im no tree hugger and i have no problem with people doing what they have to do when short on money, but i dont believe this is a money issue, just a preference one, and the way i figure it why cut off the cat when its just gonna make the motor run {expletive}ty, dirty, and sound bad? not to mention having to find a source for inspection stickers, why not just remove the muffler? or get a high flow cat?

thats prolly true about the money, i dunno, that was part of my reason for it, plus i dont care much for having a cat installed. my motor doesnt run bad, runs perfect. as for where im at inspection isnt a problem, it may be for him so that should be takin into consideration.
 

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The cat does not affect any of the performance of your engine. You could put a high flow cat on and it would improve the exhause flow. But your stock cat is not cloging down much horsepower or sound.
 
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