how much should i expect someone to charge to put in some aftermarket headers in my HR?

 

A LOT of money. It's a waste dude, spend the money that install will cost on a tune instead. MUCH better value.

 

If there not long tube headers, the only thing would be to get equal length shortys. You would get minamal gain maybe 3-5 whp at best. The 07 up eng have mandral bent unequal length shorty headers, there like the 59-79$ Ebay header. Long tube headers may give you an extra 10 whp that would be your best money spent unless you have to go thru emissions testing, you'd have to change back to original to pass emissions, and then again not worth it.
my

 

Way to not answer the OP's question whatsoever... idiot.

 

Advice and what he has for opptions is better than saying alot of money.

Which would be 4-5 hrs labor @ 65-75$ an hr depending on the shop!

Your answer puts you up there with mensa not!!!!!

 

I have installed headers on my g35 coupe, and long tubes on my 350Z, first time it took me nearly 2 full days, on the 350z, took me less than a day. There are some decent tutorials out there on how to do it. I think one of the hardest things is getting that damn coolant pipe out, always fought me...