I have the 0749CAT,how many miles can i go on it ,before replacing? Also,can you briefly tell me how to change it? It is set up under the driver's side rear fender.... THANKS...

I've been changing mine around 10,000 miles. To change it, put an pan under it, loosen with a strap wrench or filter wrench, unscrew to remove. Install is the reverse but most pre-fill the new filter as the OEM is downstream still to catch any contaminants.

10,000 is a bit early, but surely doesn't hurt anything and the element is inexpensive. you can run 18-20k on it without problems, barring a load of bad fuel of course..

if you pre-fill it you won't have to prime the system once you install the new filter.

I went nearly 15,000 miles before I changed mine. I didn't fill the cat filter first. Just put it on, started the truck and let it run till it died. Then I replaced the OEM filter and primed the system.

Yep, but I figure as cheap as they are and as simple as it is to change, then I shouldn't have any probs on the road.

Thanks Guys, I Got It!!!!

I have changed once, at about 18K miles.

Make sure you keep a spare on hand and with you on the road!