A specifically designed kit for the N51, N52, N53, N54 engines. Engine Codes: N52 B25A, N52 B25AE, N52 B25AF, N52 B25BE, N52 B25O1, N52 B25O2, N52 B30A, N52 B30AF, N52 B30O2, N52 B30U1,,N52K B25A/O1, N52K B25AE, N52K B25U1, N52K B30A, N52K, B30A/O1, N52K B30AE, N52K B30AF, N53 B25A, N53 B30A, N53 B30A/O0, N53 B30UO, N54 B30A, N54 B30A/AA, N54 B30A/TO, N54 B30TO.