Is it my idea, or does the car get louder with time after installing hiwhflow cats with stock exhaust? It seems like the car is louder now than when i first installed the cats. i sure like them though...

 

gets louder after time

 

Awsome !

 

this is the same with aftermarket exhausts too

 

The insulating material burns off over time causing the note to get louder. In some motorcycle exhaust cans that material is fiberglass which has to be repacked from time to time in order to return to factory decibel levels. Cans packed with steel wool do not need to be repacked but can get slightly louder over time. I'm not sure what the material in the cat is, but it does go through a "burn in" process.

 

The function of a cat is not to quiet the vehicle although it does alter the sound and quiet the car, but to reduce emissions. It is not packed with a stranded material like fiberglass or steel wool. They have media in them that is supposed to scrub the exhaust. They are filled with a metal catalyst, usually platinum, rhodium and/or palladium. That is why the cost so much.

Lou

 

does it drone?

 

Not at all. It just enhances the stock exhaust sound. Intake is louder.

 

heh what do they mean by drone?

 

droning means you cant talk on the phone inside your car

i cant hear a thing when my cutout is open. therefore..the droning is really bad on my car. but i can fix it with a button

 

So in other words, A load idle?

 

If you are driving down the highway at 70 mph in sixth gear and can hear the exhaust inside the cabin at a steady irritating tone, that is drone.

 

I would be interested in the hf cats, but will I still be able to pass inspection in NY?

 

++1 heard his e cutout it even drones into my car when i cruised next to you at one time.

 

visual inspection i dont think you would pass..but sniff i think you could...Crawfords are nice cats...but dont they rattle??