I have the cats off my 02 ss. Wandering if they would work with long tubes on my 99 5.3 silverado. Would they flow good enough? What do U folks think? Motor is stock. Just looking for better mpg an a little more towing power.

 

why wouldnt they? take em to the muffler shop and get em welded up. they will quiet the exhaust down nice, and take that nasty cm smell away!