I recently bought a set of Crawford HF Cats used from a member here... said he had it on his car for 1 month/500miles

My setup is Nismo exhaust, Motordyne 1/4inch plenum, and JTW popcharger.

So I recieved the package today and got the cats installed... when i first drove away... for the first 10 seconds the car was fine... then i felt some vibration coming from the cat area... after this, comes a rasp/popping sound coming from the exhaust.... and the exhaust has gone from quiet to SUPER loud now...

I dont know whats wrong... I called the shop again bu the was closing and said to go back tomorrow.... but, this isnt normal right?

Whats wrong with my exhaust??? =[ so sad.

 

Proably not tightned up enough.

 

does the car drive fine though?

 

Normal,no?

 

car drives fine....

car doesnt sound normal...

 

if the car drives fine, the chance of collapsed cat materials is eliminated. (which never been a case for Crawford IIRC)

I'd look under the car and see if anything was loose or any clearance issue undercar.

Good luck, I am putting mine on next week too.

 

thanks, after work im going to the muffler shop to have him make sure everything was installed right...

 

Any new info?
Im thinking about ordering the crawford cats, early next week. I have the nismo exhaust.

 

I remember a while back (LONG AGO) that with the Nismo exhaust thier was an issue with crawfords but I think crawford fixed it. And if anyone had issues they replaced the cats if I remember correctly it had to do with some sort of bracket or brace either not present or not in the right place..