CircIQ Brand

Infiniti G37 Tuning Module

$169.99
$199.99

$102.00

After Extra 40% Off Promo
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The CircIQ Difference

The CircIQ Tuning Module is a precision-engineered performance upgrade designed to safely optimize fuel efficiency, engine performance, throttle response, torque delivery, and overall drivability. By intelligently recalibrating real-time sensor data, CircIQ enhances acceleration, improves mid-range pull, and delivers a noticeably smoother driving experience, all without permanent modifications.

Shipping

Orders are typically processed within 1 business day, with estimated delivery in 2-5 business days depending on your location. Free standard shipping is included with every order.

Returns

Enjoy free returns within 30 days of purchase, with prepaid return labels provided and no restocking fees. For more information, please visit our Return & Exchange Policy page.
  • Up To 35 HP Boost

  • Up to 5 MPG Boost

  • Factory-Safe Operation

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Precision Engineered

Every CircIQ tuning module is precision engineered for accuracy, reliability, and performance. Proudly made in the USA using both U.S. and globally sourced components, each unit is carefully assembled and quality-tested to meet strict standards. The result? Consistent performance, dependable operation, and engineering you can trust — mile after mile.
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Easy Installation

CircIQ is designed so virtually anyone can install it right in their own driveway. The process is simple, straightforward, and clearly guided with easy-to-follow instructions. Everything is engineered for a secure, factory-style connection and seamless integration with your vehicle. No special expertise required — just a quick install and you’re ready to experience the difference on your very first drive.
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Warranty Safe

CircIQ makes no permanent changes to your vehicle’s software or factory programming. It works alongside your existing system and is easily reversible at any time by simply unplugging it. Dealer-friendly and designed with peace of mind in mind, CircIQ lets you enjoy enhanced performance today — with the confidence of knowing you can return to stock in minutes if ever needed.

WHY DO YOU NEED A CIRCIQ TUNING MODULE?

🚀 Instant Power Improvement

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Feel the difference the moment you press the pedal. CircIQ delivers gains of up to 35 horsepower and 30 lb-ft of torque, giving your vehicle stronger acceleration and a noticeably more responsive throttle. Whether merging, passing, towing or just commuting, you’ll experience smoother, quicker power exactly when you need it.

⛽ Better Fuel Efficiency

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Performance and efficiency can go hand in hand. CircIQ helps optimize engine output for smarter fuel usage, delivering up to 5 MPG improvement under normal driving conditions. That means fewer stops at the pump and more miles out of every tank — without sacrificing power.

⏱️ Easy Installation

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Upgrade your vehicle in minutes with a straightforward, driveway-friendly install. CircIQ is designed for a clean, secure connection and seamless integration with your factory system. Clear instructions walk you through the process so you can install with confidence and get back on the road fast.

🙏 Warranty Friendly

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CircIQ works alongside your factory system without permanently altering your vehicle’s software. It’s fully reversible and can be returned to stock at any time simply by unplugging it. Enjoy enhanced performance with confidence and complete peace of mind.

HOW DOES CIRCIQ IMPROVE MY Infiniti G37?

CircIQ enhances performance by safely optimizing your engine’s fuel mixture and timing curve. Modern engines rely on multiple sensors to determine the ideal air and fuel balance and precisely when ignition should occur. CircIQ refines those sensor signals, giving your vehicle’s computer better data to work with so it can automatically adjust for stronger, smoother performance.

Most vehicles leave the factory very conservatively tuned. Manufacturers commonly detune engines to allow for easy incremental model year updates while using the same core engine platform across multiple trims and years. This approach creates room for future factory increases without major hardware changes. As a result, many vehicles have built-in performance potential that is intentionally left untapped from the showroom floor.

CircIQ helps unlock that potential. Instead of forcing fixed air and fuel ratios or preset timing values, CircIQ works in partnership with your factory system. Your vehicle’s computer remains fully in control, using its built-in safeguards and adaptive learning to manage the adjustments intelligently. The result is improved horsepower, torque, throttle response, and fuel efficiency while maintaining the reliability and safety your engine was designed for.
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WHY CHOOSE CIRCIQ?

American Made. Engineered to Lead.

Every CircIQ tuning module is precision engineered for accuracy, reliability, and real-world performance. Proudly made in the USA using both U.S. and globally sourced components, each unit is carefully assembled and rigorously quality-tested to meet strict standards.

We do not mass-produce generic modules. We build performance solutions designed to integrate seamlessly with your vehicle and deliver consistent, dependable results mile after mile.

When you choose CircIQ, you are choosing American craftsmanship, controlled quality, and engineering you can trust every time you turn the key.
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WHY CIRCIQ IS DIFFERENT

Not all “performance chips” are created equal. The OBDII port in your vehicle was designed primarily for diagnostics. It allows scan tools to read codes and monitor basic data. That is it. Yet thousands of inexpensive plug-in “performance chips” are sold online claiming massive horsepower gains simply by plugging into that diagnostic port.

The reality is that the vast majority of low-cost OBDII devices are generic, mass-produced units that do not actively tune or optimize your engine. Many are little more than plastic shells with flashing LED lights that simulate activity without making any measurable change in performance. If it costs under $400 and plugs only into the OBDII port, it is very likely a fake or placebo device.
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CircIQ is completely different. Rather than plugging into the diagnostic port, CircIQ connects directly to your vehicle’s engine data sensors. This allows it to intelligently refine real-time sensor signals related to fuel mixture and timing curve. Your factory computer then uses that improved data to safely adjust performance on its own, working within built-in safeguards and adaptive learning systems.

You get real horsepower gains, real torque increases, improved throttle response, and better efficiency. No gimmicks. No light show. No placebo effect.

CircIQ was founded to fill the gap between overpriced high-end tuning solutions and cheap generic dongles. It delivers true, noticeable performance in an affordable, precision-engineered package that actually works.

30-DAY FREE TEST DRIVE

Our promise to you.

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MONEY-BACK GUARANTEE
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COST TO RETURN
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RESTOCKING FEES
Free returns. We believe the only way to truly judge performance is from behind the wheel. That’s why every CircIQ tuning module comes with a risk-free, real-world test drive.

Install it on your vehicle. Drive it to work. Merge onto the highway. Tow with it. Put it through your normal daily routine and feel the difference in horsepower, torque, throttle response and fuel efficiency for yourself.

If for any reason you’re not completely satisfied, simply send it back within 30 days for a 100% full refund. No questions asked. No restocking fees. No pressure.

We even include a prepaid return label, so returning it costs you absolutely nothing.

You can install it, use it, and experience it firsthand — and still receive a full refund if it’s not right for you.

Zero risk. Zero hassle. Total confidence. That’s how strongly we stand behind CircIQ.

REAL CUSTOMER REVIEWS

Real drivers. Real results. See why customers trust CircIQ for better performance, smoother acceleration, and improved everyday fuel mileage.