07-12 ACURA RDX 2.3L. 02-06 ACURA RSX 2.0L. 04-08 ACURA TSX 2.4L. - Fully compatible/drop-in fuel injectors for ACURA RDX applications and a very popular upgrade for HONDA applications. - B and D series engines require "top hat" adapters for the fuel injectors (not included) Injector Hats were designed to allow B and D series owners to install RDX Injectors on their older engine applications.
