they make different ty0e of locktite. Some are permanent and others are still removable

 

Red Loctite: More permanent
Blue Loctite: Not

 

wow, everybody is gobbing on the locktite. i used antisieze!!!! steel bolt in an aluminum head, i think i want antisieze. i haven't had a problem yet. no leaks and it's been about 2 years.

PB Blaster rocks! btw

 

wide band setups are better because they read more than stock. a stock O2 sensor reads from 14-14.7:1 air/fuel ratio. your computer gets feed back from that and adjusts accordingly. a wide band will read from like 1-20 air/fuel ratio. this will allow you to tune in to the best combustion combo. some even come with data logging capabilities so you can kinda get it adjusted yourself. check out www.rpmoutlet.com they have a couple different ones on there. the new O2 sensor that it comes with will just go where yours is right now.