Do I need to install high flow catalytic converters if I put long tube headers on my truck? I heard that the long tube headers will eat away at the stock cats and pieces will be sucked back into the block.
I wonder where you got the information about cat bits being sucked back into the engine block. The exhaust is one way and pressurised. Catalytic converters have to matche the exhaust and if it is too fast, it might not work correctly as well. Modifications are not as easy as clip on and og if you want to knwo all the deaitls, they have to be calculated.