Will it hurt my Compression if i remove both of my cats???

KoreanFocker · 11-13-2002

I was wondering if I cut off both the cats on my stang will it hurt the compression any? I've heard yes and no on this and hoping someone on here can help me. Right now I have it straight piped from the 2nd catback but i want to put a magnaflow on it and get ride of the cats..both of them. thanx

**74stang2togo** · 11-13-2002

I'd go ahead and ditch the cats... All a catalytic converter does is "supposedly" reduce the amount of toxic gases by turning them into carbon dioxide http://www.howstuffworks.com/catalytic-converter.htm

I, for one, believe catalytic converters do more harm than good. If you remove it, your horsepower will increase by 5-15 (depending vehicle, it's condition, and the condition of the cats) and MPG's by 2-5 (this is almost universal, my 1984 Camaro showed a 4.5 MPG increase...)

Sometimes your amount of torque will suffer, but it really depends on all of the factors involved.

A catalytic converter causes you to buy more gas and therefore speeds up our comsumption of it. I look at it this way: the better gas mileage my car gets, the less money goes to OPEC (countries such as Iraq and Iran) the less of my money that gets sent to OPEC, the less they have to spend on weapons that are going to hurt my country and the less they will be able to charge for gas because I won't need it as much.

Unfortunately, the EPA doesn't see it that way and requires us to spend much more on fuel than its worth because catalytic converters drop your MPGs so bad..

The choice is yours, I, for one, have had the cat(s) gutted on all but one car I drove... Haven't had time to do the one on the T-bird yet....

Vortex · 11-13-2002

A cat cant reduce your compression.. the shape of the pistons, deck height, head types and shapes,etc do.
removing the cats wouldnt do anything to your car...
not saying its legal tho...

KoreanFocker · 11-13-2002

aight thanx ya'll....hope to have some pics on here by Friday

JB91lx · 08-02-2006

i kno this is old but i was woundering.is there any way to take off the cats and it still be quite. cause i dont to put strait pipes. i want a silent rumble but later on.

88carazystang · 10-09-2006

go to google.video.com and search for loosechange 2 wathc it all then tell me about opec cause ur president is a two faced lying ******* who has **** u all over twice in a row and u keep taking it he cause 9/11 not Iraq those ppl are all innocent watch the movie then repost asshole

A catalytic converter causes you to buy more gas and therefore speeds up our comsumption of it. I look at it this way: the better gas mileage my car gets, the less money goes to OPEC (countries such as Iraq and Iran) the less of my money that gets sent to OPEC, the less they have to spend on weapons that are going to hurt my country and the less they will be able to charge for gas because I won't need it as much.

buckeye43 · 10-11-2006

Hmm, how do I put this? You're bout as full of pond scum as one individual can be. The President has lied to no one, that's the province of his predecessor.

The President does not set the price of oil no matter what any left wing hatchet flick tries to imply. The price is set by the the guy who pumps it out of the ground, that's called capitalism. You have a demand for his product and he sets the price. Maybe you should look in the mirror if you want to an "A"dam "H"enry

Now to answer the question of the original poster. Catalytic converters cause quite a bit of back pressure which cuts down on exhaust efficiency and robs HP. Removeing or gutting the converters will restore efficient exhaust flow but will also cause failure of emissions tests.

If you are subject to emissions tests I wouldn't suggest removing them, but you might want to look into high flow cats as an alternative.