98camaro53187

i have a 98 z28 camaro. i want to put headers on. i was looking at Hedman 68534 with Hedman 17534 - Hedman Y-Pipe.... or bbk 1694 headers with y pipe. what should i do?? thanks any input will help. i have a dyno max 19418 ypipe back already. just not sure what to do. i have some ebay headers on now with a hooker y pipe. no cats. i cant get them to stop leaking thats why i am going this way so i can get gaskets and flanges rather than clamps. please let me know what i should do thanks again...