Not to be contrary, but my cheapie Hedmans are great..........
That said, it took about 4 hours of grinding on the intake and alot of work with a dial caliper to get it just right. Almost a year and no leaks!!!!!!!
If I had it to do over, I would have gone with a better quality, ceramic set up due to the fact that the "shipping paint" on the headmans burned off within about 2 hours.
Dave