How much for a header install?

[Chevybass]

Bought some Gibson shorty headers for my 2008 Silverado so I'm wondering what the normal installation cost would be. I would do it myself but it looks like I'm gonna break a bolt for sure. If rather have a shop do it right in half the time.

[Mike GMC]

My guess would be they would charge 3 to 4 hours.  At $100 per hour, you can do the math.

[Supreme Pizza]

If the bolt is going to break, its going to break. Might have to use an easy-out or drill it out and tap some new threads. At least if you do it, it will be done right. Shop around. Call 10 different shops and ask each one for a bid. If they say you have to bring it in for an estimate, move on. Also try looking on Craigslist for back yard mechanics. Make sure you don't pay them upfront, put a cap on the labor charge, and make them agree that the bill is $0 if the job is not completed or if there are any leaks.