I'm still in the process of finding all the parts I need and want for my custom sport side exhaust sys. My question is I found these Cats on ebay and I was wondering if I should trust them and would they are compatiable for my 5.3?

 

I guess you are catting your pacesetter ORY??

 

I had those same cats (mine might have been 2.5") but without the O2 bungs on my '00 when I had my edelbrock shorty headers installed. Had them for about 10K miles when I traded the truck in for my '05. I'd buy 'em again.

 

I'm gonna put the cutouts after the Lt's like yours than cats than do duals going into a dual in/out magnaflow muffler and 12" 3.5" dia tips sport side.

 

I think I'm gonna use those same cats on my exhaust. They are Thunderbolts, my buddy has them on his 06 F150 with JBA headers and they seem to be really good high flow cats. i found them here on this site.

 

i flanged and catted my pacesetter ory with these but they were like $90 each...there isnt much room before the bend so i cut the slip on area off and then cut them down to where they were only like 7 1/4" total length...they work good so far...been on since christmas...
no more leaking header or ory....
mine were flo monsters but they look the same...and had that woven stuff in them instead of the cheaper ones...