Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,858
Eddie- Welcome to Ferrari Life. The F355 exhaust manifold issue is only solved if the car is fitted with updated headers or exhaust manifolds. Normally, Tubis are only the muffler and tailpipes. If Tubi headers are fitted, then yes, the problem is solved.
The valve guide problem is usually permanently fixed with new guides. Seems like Ferrari got some bad guides during the time the F355 and 456 were being built. There are much better guides available than the OEM Ferrari valve guides. On the 456/M, Ferrari recommended using the sintered steel guides from the 575M, but on the F355 better bronze alloy guides should last forever.
Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125
Every day I look around, and if nobody is shooting at me, it is a pretty good day.