Pre-Order Now — Ships July 4th

The Only Piggyback
That Speaks MultiAir

The Hush Puppy is the only piggyback ECU system that compensates for the MultiAir solenoid system's control — ensuring the factory ECU sees zero check engine lights. Built on Hercules in the USA.

Reserve Yours — $400 Deposit Learn More
$1,200
Total Price
0
Check Engine Lights
35
Sensor Channels
🇺🇸
Made in USA
┌─────────────────────────────────────────┐ │ HUSH PUPPY v2.1 │ │ PFtheory Control Module │ ├─────────────────────────────────────────┤ │ │ │ ┌─────────┐ ┌──────────┐ ┌──────┐ │ │ │ HERCULES│ │ FLASH │ │ CAN │ │ │ │ MCU │──│ 256MB │──│XCEIVR│ │ │ │ ARM R5F │ │ STORAGE │ │ │ │ │ └────┬────┘ └──────────┘ └──┬───┘ │ │ │ │ │ │ ┌────┴────────────────────────┴───┐ │ │ │ MULTIAIR SOLENOID DRIVER │ │ │ │ 4ch PWM · Real-time sync │ │ │ └────┬────────────────────────┬───┘ │ │ │ │ │ │ ┌────┴────┐ ┌────┴───┐ │ │ │ SPARK │ │ FUEL │ │ │ │ 4ch I/O │ │ 4ch I/O│ │ │ └─────────┘ └────────┘ │ │ │ │ ┌─────────┐ ┌──────┐ ┌─────────┐ │ │ │4× EGT │ │2× MAP│ │5× AFR │ │ │ │ SENSOR │ │4-BAR │ │WIDEBAND │ │ │ └─────────┘ └──────┘ └─────────┘ │ │ │ ├─────────────────────────────────────────┤ │ PWR │ GND │ CAN_H │ CAN_L │USB│ └─────────────────────────────────────────┘
HUSH PUPPY Control Module — Hercules ARM R5F

Engineered for MultiAir

The factory ECU on Chrysler's MultiAir engines uses solenoid-controlled hydraulic valve actuation. Every other piggyback on the market triggers CEL codes because they can't account for this system.

The Hush Puppy intercepts all 4 MultiAir solenoid channels, synchronizing injector pulse width, spark advance, and fuel pressure in real-time — so the factory ECU thinks nothing has changed.

Powered by the Texas Instruments Hercules ARM R5F safety MCU, the same chip trusted in aerospace and automotive safety systems. This isn't hobby electronics — it's production-grade engineering.

Capabilities

Everything. No Compromises.

🔇

Zero CEL Guarantee

Full MultiAir solenoid compensation means the factory ECU never sees a fault. No limp mode. No codes. Silent operation.

📡

35-Channel Telemetry

4× EGT, 5× Wideband AFR, 2× 4-bar MAP, 8× spark, 8× injector, 8× MultiAir — all monitored in real-time at 50Hz.

🤖

AI-Powered Tuning

Connected to OpenClaw AI. Your tunes get smarter with every drive. Over-the-air map refinements pushed automatically.

🔐

Military-Grade Security

AES-256-GCM encryption at rest. TLS 1.3 in transit. Ed25519 digital signatures. mTLS device authentication.

🖥️

Touchscreen Display

Included 4.3" IPS touchscreen shows live gauges, fuel maps, and sensor data. Plug and play — no phone needed.

⚡

Square-Law Fuel Control

Physics-based fuel pressure mapping using P = P₀ × (Q₀/Q₁)². Not lookup tables — real engineering.

Technical Specifications

Built Different

R5F
Hercules MCU
50Hz
Sensor Polling
256MB
Flash Storage
CAN 2.0
Bus Protocol
4ch
Spark I/O
4ch
Injector I/O
4ch
MultiAir I/O
35
Total Sensors
4×
EGT Probes
5×
Wideband AFR
2×
4-Bar MAP
USB-C
Data + Power
🇺🇸

Designed, Engineered & Built in the USA

The Hush Puppy ships on America's 250th birthday. Every unit assembled domestically with American-sourced components.

JULY 4TH, 2026 — AMERICA'S SEMIQUINCENTENNIAL
Reserve Yours

Secure Your Unit

Pre-Order
Hush Puppy Complete Kit
Control Module + Harness + Touchscreen Display
$1,200
$300 × 4 components
Hush Puppy Control Module $300
Fuel / Spark / MultiAir Harness $300
Touchscreen Display Unit $300
Sensor Pack (EGT + AFR + MAP) $300
Total $1,200
⬇ Deposit to reserve (due today) $400
Remaining balance (due before shipping) $800
🔒 Secured by Stripe · Remaining $800 due before July 4th shipment

Every Pre-Order Includes:

  • Hush Puppy control module (Hercules R5F)
  • Complete fuel, spark & MultiAir wiring harness
  • 4.3" IPS touchscreen display unit
  • 4× EGT probes + 5× Wideband AFR sensors + 2× 4-bar MAP sensors
  • Cloud telemetry account with OpenClaw AI tuning
  • Over-the-air map updates for life
  • Priority support from PFtheory engineers
FAQ

Questions

What vehicles does the Hush Puppy support?
All Chrysler MultiAir engines: Dodge Dart 2.4L & 2.0L, Jeep Renegade 2.4L & 1.4L, and Chrysler 200 2.4L MultiAir. If it has MultiAir solenoids, the Hush Puppy was built for it.
Why doesn't it throw check engine lights?
The Hush Puppy sits between the factory ECU and the engine's actuators. It intercepts and compensates the MultiAir solenoid signals so the ECU's feedback loops remain within factory tolerances. The ECU never knows there's a turbo system on the engine. Every OBD-II monitor passes clean.
What is the $400 deposit for?
The deposit secures your production slot. We're ordering Hercules MCU boards and sensor packages in bulk — your deposit funds the component procurement. The remaining $800 is due before your unit ships on July 4th, 2026.
What is OpenClaw AI tuning?
Every Hush Puppy streams telemetry to PFtheory's cloud. Our AI agent (OpenClaw) analyzes your AFR, fuel trims, EGT, and boost data — then pushes refined fuel maps over-the-air. Your tune gets smarter the more you drive.
Is the deposit refundable?
Yes. Full refund available up to 30 days before the July 4th ship date. After that, deposits are non-refundable as components will have been procured.
Do I need a tune?
The Hush Puppy comes with a baseline map calibrated for your specific vehicle. OpenClaw AI refines it automatically. For DIY builders with custom setups, our engineering team works with you through the cloud portal.
💜 Support PFtheory
Help fund Hush Puppy R&D. Every dollar goes toward Hercules boards and sensor procurement.
$
🔒 Secured by Stripe · Tax-deductible where applicable