The diameter of the roundness The total length The diameter of the rod/stem The intake valve *9 *3.3 5.5 The exhaust valve *4 *2.6 5.5 Our p...
The diameter of the roundness The total length The diameter of the rod/stem The intake valve *1.5 *1 5.5 The exhaust valve *7 *9.7 5.5 Our pr...