Does anyone know the correct part number for magnaflow cats that will fit a c5 corvette? Do they perform as well as the random tech cats? I can find these for $50-$70 per cat. which is a lot cheaper than buying a random tech setup. I have a weld-on x-pipe lying around, and I can buy a set of ceramic coated long tube headers for $560, so $700 bucks for all the parts I need for a long tube/cat/x-pipe setup is a lot better than $1400+ for a complete system.