DCOE, DCO/SP, DGAS, DGMS, DGV, DGAV, DMTL, DMTR, IDF, IDA, DCD, ICH, DCNF, DRT, DFM, DFV, TLDM, DFT, DIR, DFEV, TL, DRTC, DFTH, IDAP, ICEV & many more. F2, F11, F15, F16. For mixture weakening at low rpm or during slight accelerations (orifices at the top).