i will agree on having the replica headers crack. i have had mine on my car for well over 60k miles, (probably about 5k boosted) and i noticed that my turbo was taking forever to spool up... anyways long story short my borla rep's were cracked at one of the welds... but if you have anyone that can tig weld, it was a really easy 5 minute fix job.... and i have had my headers on my car for a long ass time ( not to mention i have bottomed them out on the road enough to dent the bottom of them) and they are holding most of the pressure from my heavy ass turbo.