i have 5 370cc injectors from a 1990 300zx twin turbo with 2000 miles on them. they are still in the fuel rail. the fuel rails have about 110,000 on them. i bought these off a guy on tt.net. he was replacing them with 555cc injectors. the guy he bought the car off of had new injectors put in and only put under 2000 miles on them.
I had a dead injector so i was going to do all six but i could get to the one without taking off the manifold. The one I used has worked perfectly ever since. I'll sell these for $220 shipped. Email me at twinturbo_z@hotmail.com . Thanks.