I have a 99 Si, I took off heat sheild, all the nuts and bolts connecting the headers, unhooked the o2 sensor...everything is disconnected!....stock headers won't budge..is there a trick to take it off? or am I missing a bolt? ...theres 2 connecting to the cat, 2 near the o2 sensor, then 9 on top...sorry in advance for this newbie post

 

there is a bolt at the bottom of the block by the a/c compressor on the drivers side to the header