DEC does not sell you a universal cat. You can use all of your OE hardware and gaskets. This is an aftermarket piece priced significantly lower than the Genuine BMW equivalent. Although Genuine BMW will be a higher quality overall it comes with a price tag typically x higher. DEC EPA-approved cats have a 2 year or 25, mile warranty on the catalytic material and a 5 year or 50, mile warranty on materials and workmanship.
Catalytic converters rarely fail on their own. I used huge worm drive hose clamps to strap them down on mine. I did it 4 years ago, and it's still quiet. Originally Posted by 98M3cab. Here is a classy solution provided by a member, edited for content.
I'm going to do this. This will push the heat shield away from the pipe and put tension on the heat shield which will stop the rattle. This was done 2 years ago. The exhaust pipes on BMW's are very thick and the screw won't puncture or hurt any thing. I haven't had to tighten the screw yet. There is tension on the heat shield which puts pressure on the screw preventing the screw from loosening.
I'm pretty sure removing a heat shield is illegal. Take it to a muffler shop and have them weld it. Catching something on fire because a missing heat shield is another thing. I'm not suggesting that it would happen since there are obviously members who have removed the heat shield before yet their cars are yet to catch on fire. I think I chucked the rattling shield 5 years ago, saves weight,too.
Bringing this one back Can you show me what a worm drive hose clamp is? Do you have any pics of the screw thru the heat shield method? I am favoring this one. What about wrapping some large metal strapping around both cat shields?
One of mine is rattling, but the other is not. Just fyi, I put in some sheet metal screws through the heat shield slots and tightened them up to the pipe and it secured it in place. So simple, yet effective. Although Genuine BMW will be a higher quality overall it comes with a price tag typically x higher. MagnaFlow EPA-approved cats have a 2 year or 25, mile warranty on the catalytic material and a 5 year or 50, mile warranty on materials and workmanship.
Catalytic converters rarely fail on their own. In most cases, another issue has caused the catalytic material to be contaminated, overheated, or damaged, leading to failure.
Replacing your failed catalyst without solving the root cause of failure will void any warranty and significantly reduce lifespan of the replacement catalyst. It is the customer's responsibility to diagnose and determine the root cause of a catalyst-related engine code. Before spending thousands of dollars on a new catalytic converter, make sure you have considered and investigated all other potential sources for your fault codes - oxygen O2 sensors, cooling system, intake or exhaust leaks, fuel injection, vacuum, secondary air system, and other emissions-related equipment.
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