Ignitions and Electrical› Computers, Chips, Modules and Programmers

FordPerformance

ProCal 4 Calibration Tool

$1,395.00

SKU: M-9603-M8B

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Ford Performance M-9603-M8B Calibration Kit is engineered to significantly enhance the performance of 2018-2021 Mustang GT models. This comprehensive kit includes an 87mm Bullitt throttle body for improved airflow, a Ford Performance cold air intake system to supply cooler, denser air to the engine, and the ProCal 4 calibration tool for easy installation and tuning. This calibration kit delivers noticeable improvements in horsepower and torque, with reported gains of +19 HP at 6,500 RPM and substantial torque increases, including 42 lb-ft at 2,000 RPM and 18 lb-ft at 4,500 RPM. It also provides sharper throttle response, making the vehicle feel more immediate and engaging. Key requirements and considerations for this kit include the mandatory use of premium fuel, with a minimum octane rating of 91. Additionally, this kit supports gear ratio changes up to 4.90:1. Ford Racing Parts calibrations are built with exclusive Ford proprietary software and engineering, ensuring optimized performance while remaining emissions legal. This kit is protected by a 3-year warranty, offering peace of mind with your performance upgrade.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Available on iOS & Android

Specifications

BrandFordPerformance
Part NumberM-9603-M8B
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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