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Brand new complete, with valves and springs.
These will come in original GM boxes BRAND NEW!
Maintain your piston to valve clearance by using brand new!
We can also fit performance valve springs in house at an extra cost if required. (comes with factory springs otherwise)
Aluminum performance head
Head 12615879 is assembled with the following components:
top place to deal with
Arrived right on time and packaged well and as advertised