It's been about 2 weeks since my LT install and think I may have a small leak. I want to tighthen up the header bolts again, because I know they can expand after a few heat cycles. Do they have to be re-torqued to a certain spec? Thanks...

FYI, I re-used the stock bolts as suggested.

 

should be 18ft-lbs. they probably havent come loose if you torqued them right in the first place.

 

You could always buy some Stage 8 lockers and not worry about it again.

 

Two weeks of driving after the LT install, my mechanic said the header bolts are still nice and tight.