Bob Boberson

iTrader: (3)

How much performance is gained from hollowing a cat, esp. a clogged one?
How much louder is it?
Is it worth it?
For emissions i need to get a new cat so i'll have my friend weld it in, then after testing i will take the old one, hollow it out, and reinstall it.
Does it sound like a good idea?

KeloidJonesJr.

iTrader: (8)

Go for it! Pops sound nice.

alexdimen

iTrader: (13)

i've got a new main cat and a hollowed out pre-cat.

trust me, don't hollow it out. it will sound like your exhaust is running through a coffee can. it kind of sounds like you have an exhaust leak at low rpm's and probably creates turbulence.

Bob Boberson

iTrader: (3)

should i just go high-flow instead?

NoviceRotaryTech.

No, it sounds like murder, why would you want to hurt fluffy the kitty?

anyway, seriously now, Im going to replace mine with a presilencer, as soon as I can get it welded.

SpooledupRacing

if u want a hollowed out cat I have both front cats that are hollowed out I will sell u them both for 35.00 shipped this way u can try them if u like them u can have them if u dont atleast u did not ruin yours again these are the fron tow not the main cat.

evelhalo

you guys and your loudness, who cares hw loud?? is there actually some performance gain or just a cheap way to ruin my emissions?

MidnightOwl

My vert had a clogged cat and I gutted it, sounded just fine. I got better gas mileage too, true story.

SpooledupRacing

sounds good, horsepower gains yes, who cares about emissions if u are in a no emissions state!!

mort2002

iTrader: (1)

mine clogged up in my 88se when i drove like 200 miles. i noticed i was having to downshift more and wasnt picking up as fast. i pulled it out and beat all the **** out of it, ran much better, more power and gas milage. BTW mine got a lil louder but sounded good. not like a coffee can on mine. bet ehh i would do it..

Bob Boberson

iTrader: (3)

yeah, i guess im just gonna go ahead and gut it, i dont have the precats, and if i dont like it too much, i can just weld the magnaflow high flow back in that im getting on ebay for like 50 bucks.