Phormula Knock Sensor & Knock Monitor Systems

Phormula Knock Sensors & Knock Monitoring Systems are built for one job: help you detect detonation (knock) before it becomes expensive engine damage. EDO Performance is the only stocking distributor in the USA for Phormula, so you get real inventory, fast fulfillment, and worldwide shipping—with direct brand support.

Why Phormula?

Real-time knock monitoring so you can tune or drive with confidence.

Clear alerts (visual + audible), plus options for data logging and external triggers (model dependent).

Complete kits that include a high-quality Bosch knock sensor and shielded cabling.

Choose the right Phormula setup

In-car monitoring (street/track): KS-3 or KS-4 — mount it and continuously monitor knock.

Tuning / dyno listening: KS-Pro — audio knock detection (“det cans” style) with excellent clarity.

Pro tuners: Professional Tuning Solution — combines KS-4 visual + logging with KS-Pro audio for the most complete picture.

Popular Phormula products

KS-3 Knock Detector: LCD knock gauge + warnings, configurable knock-frequency filtering.

KS-4 Knock Monitor: adds configurable 0–5V output for data logging and an external trigger to run your own warning strategy.

KS-Pro Audio Knock Detection: premium audio knock listening solution trusted by professional tuners.

Replacement/extra Phormula knock sensor: KS-3/4 replacement sensor available—ask us if you don’t see it listed.

Why buy from EDO Performance

USA’s only stocking distributor for Phormula

Worldwide shipping

Direct relationship with the brand for support and product guidance

Need help choosing? Tell us your engine setup and whether you want dash monitoring, audio tuning, or ECU/dyno logging—we’ll point you to the right Phormula knock sensor kit.

FAQ

Do Phormula kits include the knock sensor?
Yes—Phormula kits are sold as complete kits and include the knock sensor and cabling. 

What’s the difference between KS-3 and KS-4?
KS-4 adds a configurable 0–5V output for logging and an external trigger for your own warning/strategy, on top of the core knock monitoring features.

Can I log knock to my ECU or dyno?
Yes—KS-4 provides a 0–5V analogue output intended for data logging and ECU/dyno integration.

Which one is best for tuners who want to listen for knock?
KS-Pro is the dedicated audio knock listening tool; the Professional Tuning Solution combines KS-Pro audio with KS-4 visual/logging.

Do I need to set a knock frequency?
Yes—KS-3 and KS-4 are configurable for knock frequencies (commonly set based on engine characteristics).