i just put a turbo muffler on my 3.9L dakota but that ant loud enough for me, there is a hole in the cat i might cut that off, any idea how much louder it will get? i dont want it to loud my dad wouldnt like that, could i just fill in the hole and plugg the leak? thanks for any help

 

To make it louder put some glass packs on it. Cherybombers. To some those can be to loud. Flowmaster has sound bits on their website. You can hear them before you buy it. Cuting the cat will change the sound but not by much.

 

cutting the cat will have a bit change!...try it!..

 

well i gess ill try it, i just want a low rumble out of it it dont need to be super loud its only a v6

 

well this morning we were going to do it in the shop at school, well as soon as we got the sawzall up the the pipe my teacher came over and told us not to do it in the school shop because he could get in trouble, so we just pluged the hole in the cat with a bolt and called good, we are going to do it at my buddies house on friday night he has a pipe fitter and everything so it should go pritty good.

 

FWIW the old 2.9 in my Bronco II was MUCH louder without a cat, like ear splitting loud. Removing the cat is also a federal offense.

 

Gutting the cat I've also noticed, creates a ticking/empty can sound, which is not that pleasant.

I 've worked on a van with the 5.9 engine that has a Y pipe after the cat and a 20 inch long cherrybomb plus 2.5 inch diameter piping and it sounds very nice, deep tone but not annoying, and loud but it passed inspection.

Getting a longer glasspack will create a deeper rumble but the frequency may be so low it'll make things vibrate a lot more, so 20-25 inches in length is enough

 

what is the worst thing that could happen if i get caught?

 

Does yous stated have emissions test? If not who care cut that sucker out. If you get a ticket which is what would mst likey happen the first time you could probably say thats how you bought the truck No big deal

 

Gutting the cat is the stupidest thing you can do in terms of getting rid of it! It will in fact harm the engines performance, cause the exhaust gasses will expand in the open chamber and then require work to be recompressed (and that work is coming from the engine). If you're going to remove the cat, cut it out completely and replace it with a peice of straight pipe... thats how I have mine and it got a lot louder. I also have a flowmaster 40 and it sounds sick! (especially engine braking)