hi guys, i have a f 355 fiero with 3.4 puschrod open k@n filter , and (stock )exhaust system with cat and oem muffler with resonated tips,
but its loud to me,how can i make it quiter, i get headach if i drive it everyday,so it must be quiter, can i put a little resonator after the cat
and if that is not enough another little resonator before muffler i had put cc inserts between cat and muffler but it didnt do much.
i realy need to do this,please help ,thanks

Is the stock muffler old? Sometimes they loose the baffles and still look good on the outside.

Your CAT may be gutted, and that will increase the noise. Like the man said, the muffler could be rotted inside.

Time for a new CAT and a new muffler.

Arn

muffler is new, and the cat is not clocked

Some mufflers are not so quiet. What type of muffler do you have?

Arn

the muffler is stock oem (walker)

Vibrant brand resonator should quiet things down to your satisfaction.

http://www.ebay.ca/itm/Vibr...em48475e0107&vxp=mtr

Or Ultra Quiet... http://www.ebay.ca/itm/New-...em3a82fdb4b3&vxp=mtr

[This message has been edited by I FAR I (edited 07-28-2013).]

If your cat has pressed in plugs, I have had them burn out.

Have you had it up on a lift to look at it running?
Look for splits in the tubing or other leaks that can cause noise.

i am planning for two ultra quiet vibrant resonator 1 after the cat and 1 before the muffler, or is just 1 enough,what you guys think of this

hi guys, i looked at my cat and its small in size, is the original one big in size, maybe thats why its too loud

so finaly we put a mid muffler (center silenser) it quited down the noise ,but its too restrictive while i am driving,the car is hesitating ,not responding well if i throttle, and we put it just before the muffler, should i put that of again and put a ultra quiet resonator instead of the centre silenser, i saw that the vibrant resonator was not restrictive it has the same diameter as the stock exhaust pipes of the fiero