Hello everybody, Had a question regarding the Mopar Eagle headers for the 5.7L hemi. I own a 2010 dodge r/t and want to add one of my last mods which would be headers. I don't want to void the warranty I currently have on it so I was told I would have to get the ones that Mopar are selling which are: Headers 2009-10 Charger/300/Challenger, 5.7L Eagle part number P5155484 and buy the wire extension oxygen sensor part number P515535. This comes out to be like 1400 for the buy and install......Is this worth it??? I got my mechanic friend( wrench nut) who says yeah, but the price vs the 14 to 18 HP gain doesn't seem worth it. Should I just buy another brand which would be be cheaper and install or go with the Mopar one??? Yours truly, confused and dazed.