I need a little help. There are no warning lights and the truck runs normal, but there is a loud knocking sound coming from the Catalytic converters. What would cause this, and how do I fix it. The only replacements I can find are somewhere between $500-$800 each. Any suggestions on what to do or where to get new ones?

 

Welcome to Dodge Forum. I will move this to the 2nd generation Ram section (1994-2001 Rams), get you some answers.

 

Do you have one cat? Or do you have california emissions?

 

If you dont have cali emissions, you should only have one cat....if so you can pick up a universal magnaflow cat for under $200, someone should have a link up soon, if you have the older style cat that also doubles as a y pipe you can get a shop to put a y pipe in and install the cat right after....if you have the newer style exhaust they can just cut the old one out and replace,(unless you can weld then you can do this yourself)

 

my stock cat is also the y-pipe, but jegs has off-road y-pipes for like $125, and cats for $120
its one of the items on my list

 

http://performance-curve.com/thunderbolt-spincat.aspx

 

i just took my cat off and special ordered a y pipe so i can get universal cat.

 

had same symtom on a 95, heat shield on cat vibrating causing the noise