Factory K-series Injector Sizes

JDM K24A RAA/PPA
(ECO K24A engine found in JDM accord/step wagon/odyssey vehicles)

K24A1
(US 02-06 CRV aka PPA K24)

K24A4
(US 03-05 Accord, 03-06 Element)

K24A8
(US 06-07 Accord, 07-11 Element)

K20A6
(Euro based Accord)

K20Z1
(05-06 RSX Type-S)

K20Z3
(06-11 Civic Si, 06-11 Canadian CSX Type-S)

K20Z4
(UK/AUS/NZ FN2 CTR)

JDM K24A RBB
(Performance K24A engine, equivalent to a USDM 04-05 K24A2. 03-08 CL9 Accord, RB2/3/4 Odyssey )

K24A2
(US 04-08 CL9 TSX)

K24A3
(UK/AUS K24A2 equivalent, CL9 Accord Type-S)

Unless you surely know what engine you pulled a set of 270cc or 310cc injectors from, there is no easy way to visually discern factory black bodied 270cc injectors from 310cc injectors. An injector flow test will definitely tell you an injector’s flow rate and CC size.

RDX 410cc injectors are easily identifiable by their iconic blue body color. A warning that many fake RDX injectors exist on the market these days. So make sure you only purchase these from a reputable seller or directly from the dealership. There are many articles + videos if you google this topic to help discern fake from real RDX injectors.