well at first i thought that this was gonna be a great manifold, but it turned out to be very disappointing. i bought the manifold and not even 7000 miles on the new CAST manifold it cracks all the way around it. and no i don't have a race car putting like tons of heat and stress on it just a normal dsm in new England well here are some pics of what the manifold did with less then 1 calendar year. if this car was daily driven this would have cracked in like the fist 2 to 3 months.