Rywire K to B Series Sensor Adapter for K20/K24

Rywire K to B Sensor Adapter

The Rywire K to B Sensor Adapter is a clean, reliable way to run proven B-series sensors on your K-series engine harness. Whether you need a B series MAP sensor adapter or a B series TPS adapter, this plug-in piece takes the headache out of wiring and gives your K-swap stable sensor data for smooth drivability and repeatable tuning.

If you’re running a K-series with B-series intake parts or an aftermarket throttle body, this K series to B series adapter lets you plug a B-series TPS or B-series MAP straight into your existing K harness—no cutting, soldering, or sketchy butt-connectors. You get a tidier bay, cleaner logs, and a K to B sensor harness you can trust long-term. We run this Rywire K to B adapter style setup on our own cars for exactly that reason.

Why Run B-Series Sensors on Your K?

Plenty of K-swapped cars fight with jittery throttle position data or noisy MAP signals—especially with big throttle bodies, boost, or standalone ECUs. B-series sensors have a long track record for being predictable, durable, and well-supported across Honda tuning. Most tuners know their scaling by heart.

• More stable tuning: B-series TPS and MAP sensors usually give cleaner, more repeatable signals.
• Easy to replace: You can still buy brand-new, reliable B-series sensors from Honda without hunting used parts.
• Built for mixed setups: Ideal if you’re mixing a K-series long block with B-series intake parts or throttle bodies.

If your TPS trace looks like an EKG, your MAP signal won’t settle down, or you just want the consistency of Honda’s B-series hardware, a Rywire sensor adapter is what a lot of serious builders end up using. The goal is simple: stable data and less wiring drama.

Key Features

• True plug-and-play: Snaps between your factory K harness and a B-series TPS or MAP sensor—no re-pinning or custom K to B series harness work.
• Cleaner data: Helps get rid of weird spikes and dropouts you can see in logs from mismatched K sensors.
• Proven hardware: Lets you run OEM-style B-series Honda sensors that are known to stay accurate for years.
• OEM-style install: Short K to B throttle position adapter / MAP pigtail for a tidy Rywire B series throttle sensor adapter look in the bay.

Options & Specifications

• Rywire MAP Adapter: SKU: RYW-K-B-MAP-ADAP — B series MAP sensor adapter to plug a B-series MAP into a K harness (Rywire MAP sensor adapter).
• Rywire TPS Adapter: SKU: RYW-K-B-TPS-ADAP — K to B throttle position adapter to run a B-series TPS on a K harness (Rywire throttle position sensor adapter).

Each Rywire K to B sensor connection is about 5 inches long and converts the factory K-series wiring to accept either a B-series throttle position sensor (TPS) or a B-series manifold absolute pressure (MAP) sensor. Pick the Rywire K series sensor adapter that matches the sensor you’re using, or grab both if you want full K to B sensor harness flexibility for future changes. We use these same Rywire sensor adapter pieces on our own swaps for exactly that reason.