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Denso RDX 410cc Injectors

WARNING: Cancer and Reproductive Harm

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These are genuine Denso RDX 410cc (K-series) saturated injectors. These are an affordable alternative fuel injector set that provided a better spray pattern than stock while also allowing more fuel. For the enthusiast who is moderately building their car and not yet ready to make the jump to a much bigger cc injector, RDX injectors are the way to go.

RDX Injectors are rated for 410cc (at 38 psi) and 550cc (at 70psi) and offer a much improved spray pattern over factoryK20A and K24A injectors. Dyno tests have shown (via forums) a bolt-on performance gain of approx. 5hp by just switching over to RDX injectors. Some tuning may be required depending on engine application. These also work for B/D/F/H-series engines with an aftermarket fuel rail (specifically made for RDX injector) along with an engine management system.

Sold as a set of 4 injectors (clips required and are not included! - not compatible with non-RDX oem injector clips).


  • Rywire RSX Harness to RDX Injector Adapters: For RSX, EP3, and K-swapped golden era cars.

  • Rywire OBD1 Harness to RDX Injector Adapters: If you've got a 92-95 Honda/Acura, you will want these Injector Adapters to easily plug in your RDX injectors.

  • Rywire OBD2 Harness to RDX Injector Adapters: Clips required to run these injectors on your 96-01 OBD2 and K-series engine applications (including RSX/EP3/TSX/K-swapped engines/vehicles).

  • K-Tuned RDX injector hats for B/D series engines:K-Tuned RDX Injector hats convert k series injectors to B/D series injectors.