Original owner of my M5 replaced plastic T pipe with brass, most likeley due to frequent breakage as I've heard can occur with these, esp. when trying to mess with em. Brass will last much longer and won't break - worth the extra effort and price (minimal). Coolant hoses replacement shouldn't be too hard - pretty straightforward -and a good time to do w/ new radiator (I just replaced my radiator too - looked like the original, and with 230,000 miles!)