{"id":1489,"date":"2016-05-25T07:17:00","date_gmt":"2016-05-25T03:17:00","guid":{"rendered":"https:\/\/ff-squad.com\/wp\/?p=1489"},"modified":"2026-05-30T01:56:46","modified_gmt":"2026-05-29T21:56:46","slug":"factory-k-series-injector-sizes","status":"publish","type":"post","link":"https:\/\/ff-squad.com\/technet2\/factory-k-series-injector-sizes\/","title":{"rendered":"Factory K-series Injector Sizes"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” row_position_desktop=”default” row_position_tablet=”inherit” row_position_phone=”inherit” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” flex_gap_desktop=”10px” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n\n\n\n
270cc Injectors
\nConnector Type: OBD2<\/strong><\/td>\n		310cc Injectors
\nConnector Type: OBD2<\/strong><\/td>\n		410cc Injectors
\nConnector Type: RDX\/Scion TC<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
\n

K20A3<\/strong>
\nUS 02-06 RSX Base, 02-05 Civic Si EP3<\/span><\/p>\n

K20A4<\/strong>
\nEuro CR-V<\/span><\/p>\n

K20A6<\/strong>
\nEuro Accord<\/span><\/p>\n

K20Z2<\/strong>
\nCanadian 05-11 FD5 Civic CSX; eco engine with a detuned RBC head. A unique engine but still eco based lol.<\/p>\n

\u00a0JDM K20A – ECO variant<\/strong>
\nECO variant K20A engine PNL\/PNC;\u00a0 JDM version of the K20A3.<\/p>\n

JDM K24A RAA\/PPA – ECO variant<\/strong>
\nECO variant K24A engine found in JDM Accord\/Step wagon\/and Odyssey lower grade model vehicles.<\/p>\n

K24A1<\/strong>
\nUS 02-06 CRV<\/p>\n

K24Z1<\/strong>
\nUS 07-09 CRV; not a single exhaust port K24Z engine!<\/p>\n

K24A4<\/strong>
\nUS 03-05 Accord, US 03-06 Element<\/span><\/p>\n

K24A8<\/strong>
\nUS 06-07 Accord, US 07-11 Element<\/span><\/p>\n<\/td>\n

\n

K20A2<\/strong>
\nUS 02-04 RSX Type-S, UK 01-05 EP3 Civic Type-R<\/p>\n

K20Z1<\/strong>
\nUS 05-06 RSX Type-S<\/p>\n

K20Z3<\/strong>
\nUS 06-11 Civic Si, 06-11 Canadian CSX Type-S<\/p>\n

K20Z4<\/strong>
\nUK\/AUS\/NZ 03-10 FN2 Civic Type-R<\/p>\n

JDM K20A Type R – Performance variant<\/strong>
\nPerformance JDM variant K20A Type-R engine family found in EP3-R\/DC5-R\/FN2-R\/CL7-R\/FD2-R vehicles.<\/p>\n

JDM K24A RBB<\/strong>
\nPerformance JDM variant K24A engine found in the 03-08 CL9 Accord, RB2\/3\/4 Odyssey vehicles.<\/p>\n

K24A2<\/strong>
\nUS 04-08 TSX<\/p>\n

K24A3<\/strong>
\nUK\/AUS 03-10 CL9 Accord Type-S<\/p>\n<\/td>\n

K23A1<\/strong>
\nUS 07-12 1st gen Acura RDX<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
\n

Notes<\/strong>
\nUnless 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. From my experience, the etched alphanumeric numbers printed on the body of these oem injectors do not help indicate their CC size or which vehicle they originated from. Performing an injector flow test is a sure way to identify an injector’s flow rate and CC size.<\/p>\n

The RDX 410cc injectors are easily identifiable by their iconic royal blue body color. But take heed, there are many fake RDX injectors 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.<\/p>\n

Decapping Injectors (budget racer DIY hack)
\n<\/strong>This old thread on K20A.org<\/a> exploits a hack known as decapping<\/em> for the factory eco and performance K-series injectors. Decapping significantly bumps up the CC size for free by simply and carefully removing the laser welded screen from the tip of the injector after carefully removing the pintle cap.<\/p>\n

Member Chunky’<\/em> found the following information out after sending decapped 270cc & 310cc injectors over to RC Engineering for flow and spray pattern testing:
\nModded 270cc injectors are bumped to 490cc<\/strong>, and are rated as an “excellent” spray pattern post-mod.
\nModded 310cc injectors are bumped to 520cc<\/strong>, and are rated as a “good” spray pattern post-mod, excellent rate pre-mod.<\/p>\n

He did not get around to decapping RDX 410cc injectors, but it’s assumed that their already excellent spray pattern would be ruined if decapped.<\/p>\n

If you decide to give this a shot here’s a few extra important details:<\/p>\n