best 160 bucks iv ever spent
 

i just did a magnaflow cat on my 03 old alero v6 i was having transmission trouble also cat troubles. so i order the cat . replaced it and test drove it.. holly crap like a brand new car transmission shifts alsome can def feel allot of difference in tq... buy a magnaflow cat..

or just cut out your cat altogether :-) I did and I'm satisfied

cutting cat = horrible performance.

DON'T LISTEN TO HIM

Tell us more Cherrington.

I was going to buy a 'performance' cat recently but people in the know at work told me its a gimmick. The huge difference the OP felt is likely due to his former cat being clogged, causing his engine to choke on its own fumes. Mine wasn't that bad and when I changed it out it was like driving a different car.

Horrible performance? What are you talking about haha I noticed a gain in performance for sure!

I hollowed mine out and that bitch roars now.

Noticed it with your ass dyno no doubt.

PS Louder is not the same as faster

quoted for truth

i was JUST thinking that LOLOLOL :lol:

Attention morons, modded cat does not affect teh sound of exhaust.

attention captain deaf

it does.. trust me.

edit: are we thinking of the same cat? cause we're talkin about catALYTIC converters

Mine is no louder after being hollowed out. But it sure did pick up on some power.

You're the genius who took a stick and bashed the insides of your cat out, and you JUST said it roars now.

forgive him, for i think he's had a few drinks by this time of evening :lol:

If by cutting Cat you mean removing it and replacing with a pipe of same diameter, well you will get more performance than with the stock Cat.

However, your car becomes illegal and with all the testing that was done on dynos about the "High flow cat" VS "Cat delete" it was shown very few difference btw the two, lets say .2 hp difference.

Well heres to that at least. :drink:

Vinalero What do you say abt the universal cat vs 'high flow'?

Power wise. Sorry for your misinterpretation.

I wouldn't say that the max power is hugely affected, but the midrange mos def is.

OMG!! Not another animal abuser thread!

Rofl.