4 Position Power Distribution Block Kit
$39.99
Fuse-Block-Kit
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Simplify your 12V power distribution with our 4-Position Power Distribution Fuse Block Kit. This compact solution makes it easy to power multiple accessories or...
ECU Power Package
$99.99
ECU-Power-PKG
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Powering your PNP or Universal Harness doesn’t have to be a headache. The  ECU Power Package includes everything you need to get up and running quickly...
50 Amp Fuse Holder Kit
$29.99
50A-Fuse-Holder-Kit
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Looking to protect your high-current wiring with confidence? Our 50 Amp Fuse Holder Kit includes everything you need to safely fuse your 12V power...
MS3Pro EVO+ Wiring Harness Package – Universal Flying Lead
$349.99
MS3Pro-EVO+-HRN-PKG
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The MS3Pro EVO+ Wiring Harness Package is a full-featured, 8-foot flying lead harness built specifically for use with the MS3Pro EVO+ ECU. With white, black, and gray AMPSEAL connectors and...
MS3Pro ULTIMATE Black Center Harness
$59.99
MS3Pro-U-HB
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Unlock expanded I/O for your MS3Pro ULTIMATE ECU. The MS3Pro ULTIMATE Black Center Harness is an 8-foot flying lead harness designed specifically for the...
MS3Pro Mini Wiring Harness – Universal Flying Lead
$74.99
MS3ProMini-8HRN
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Simplified wiring for MS3Pro Mini—built for clean installs and full ECU functionality. The MS3Pro Mini 8′ Flying Lead Harness is a complete, pre-labeled wiring...
MS3Pro EVO+ HC Wiring Harness Package – Universal Flying Lead
$349.99
MS3Pro-EVO+HC-HRN-PKG
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The MS3Pro EVO+ HC Wiring Harness Package is a full-featured, 8-foot flying lead harness built specifically for use with the MS3Pro EVO+ ECU. With white, black, and blue AMPSEAL...
MS3Pro Mini & MicroSquirt AMPSEAL Connector
$39.99
MicroSquirt-AMPSEAL
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Planning to make your own ECU harness? This plug and pin kit includes everything you need to get started with a custom MS3Pro wiring...
MicroSquirt Wiring Harness – Universal Flying Lead
$74.99
MicroHrn8
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MicroSquirt Wiring 8′ long harness, ideal for installation in larger vehicles or custom builds. This complete MicroSquirt 8′ Flying Lead Harness is specifically designed...
USB Tuning Cable
$9.99
USB-TuneCab6
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This USB A to Mini B cable is used to connect your MegaSquirt or CAN-based device to a laptop or tuning interface. It’s the...
M8 Tuning Cable
$29.99
TuneCableM8
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This replacement M8 to DB9 serial cable is used in select Plug and Play MegaSquirt ECU models where space constraints prevented the use of...
MS3Pro Module
$929.99
MS3ProMod
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Build your own ECU around the same powerful MS3Pro core used in our MSPNP-Pro systems. The MS3Pro Module V2.1Â is the heart of the MS3Pro...
MS3Pro Mini Wiring Harness Upgrade (Microsquirt to Mini)
$19.99
Mini-Hrn-CK
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Easily upgrade your existing MicroSquirt harness for full MS3Pro Mini functionality If you’ve already installed a MicroSquirt harness and want to step up to...
MS3 Knock Module Kit
$89.99
MS3Knock-K
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This add-on board is designed to solder directly onto the MS3 daughterboard, providing two channels of knock input for the MS3 to use in retarding spark....
MS3Pro AMPSEAL Connectors
$89.99
MS3Pro-AMPSEALS
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Planning to make your own ECU harness? This plug and pin kit includes everything you need to get started with a custom MS3Pro wiring...
M12 Tuning Cable
$29.99
TuneCableM12
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This replacement M12 to DB9 serial cable is used in our Universal ECU and PNP Transmission Harness where space constraints prevented the use of...
MS3Pro Ultimate F4/F6 Replacement Fuse
$2.99
0451.375MRL
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The MS3Pro ECU lineup is equipped with user-replaceable onboard fuses that help protect against voltage spikes, reverse polarity, and other electrical issues. This 375mA...
MSPNP2 12 Pin Center Pigtail
$19.99
Conn-PNP-M12
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This 12-pin connector comes with pre-crimped 8″ black wires and is ideal for extending or customizing your wiring harness. It's the same connector included...
MS3Pro Module F1/F2 Replacement Fuse
$2.99
0451001.MRL
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The MS3Pro ECU lineup is equipped with user-replaceable onboard fuses that help protect against voltage spikes, reverse polarity, and other electrical issues. This 1000mA...
DB26 Options Pigtail
$28.99
DB26-PIG-6
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This DB26 pigtail connector is used with the MSPNP Gen 2 V1.3 ECU models that feature a 26-pin expansion connector. It's ideal for adding...
MS3Pro Gen1 F1/F2 & MS3Pro EVO F4 Replacement Fuse
$2.99
0454.500MR
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The MS3Pro ECU lineup is equipped with user-replaceable onboard fuses that help protect against voltage spikes, reverse polarity, and other electrical issues. This 500mA...
AXM-100 High Voltage Tach Adapter
$64.99
AXM-100
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Many classic tachometers—especially those from the 1970s and earlier—were designed to trigger off the negative terminal of the ignition coil, relying on a high-voltage...
AXM-110 High Voltage Isolator
$69.99
AXM-110
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The AXM-110 is a high-voltage isolator module designed to protect your engine or transmission controller from damaging voltage spikes on digital input lines. Whether...
MS3Pro Ultimate & EVO F5 Replacement Fuse
$2.99
045106.3MRL
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The MS3Pro ECU lineup is equipped with user-replaceable onboard fuses that help protect against voltage spikes, reverse polarity, and other electrical issues. This 6000mA...