Has anyone made their own y-pipes w/o cats (or chopped off their cats and re-welded) with the stock exhaust manifolds? Can't afford headers right now and I'm pretty sure my drivers side cat has a leak so I'm thinking about just taking them out and either making a new y-pipe or welding in piping where the cats were. I would really appreciate it if pics could be posted. Thanks!
Did your car throw any codes because of the piping? Thats the only thing stopping me from doing exactly what you did
Mine didn't but it is a 94 model car. It doesn't have an o2 sensor in or after the cat. I know later on they started putting o2s in the cats or in the pipe after the cats. If yours has one in or after the cat then it will probably throw a code.
94 Z-28 Camaro 6 Speed, 4:10 richmond, ultimate girdle, k&n cai, msd rotor and cap , 8mm wires, Flowmaster, 160 thermostat, m55A oil pump, cat, air, and egr delete
Not endorsing them but Speed Engineering did have Pacesetter LT headers ceramic coated with or without egr new for around $280 and ORY pipe for around $125. Check their website out I got LTs and ORY pipe to the door less than $450. Worth a shot. I don't like buying used headers never know if the flange is warped, just my opinion. Good Luck!
With a 1999 car, the PCM will definitely generate a CAT performance failure code if the Cat is missing. There are devices available, however, that install in place of the post-cat sensor that simulate the signal from a good working sensor and keep the codes from occurring.