MS3Pro Engine Management Systems from AMPEFI

Introducing the MS3Pro Ultimate

Everything you know and love about the MS3Pro system plus so much more. Check out the full list of improvements to handle your high-horsepower needs.

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MS3Pro LS 24x & 58x Plug and Play

All the features of MS3Pro combined with our easy plug and play harness, just choose your injector style and go!

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Get your MS3Pro Apparel Here

Flex your MS3Pro colors! Cotton T’s, curved or flat brim FlexFit hats!

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Featured Products View All

MS3Pro ULTIMATE Standalone ECU Only
From: $1,349.00
Experience The ULTIMATE.Developed from the MS3Pro 1st Gen platform, the Ultimate brings NEXT LEVEL capability to MS3Pro's staggering feature set beginning with a new high quality aluminum IP65 rated, water resistant enclosure. The Ultimate provide...
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MS3Pro EVO Standalone ECU Only
From: $1,099.00
Introducing MS3Pro EVO. (supersedes 1st Gen MS3Pro)MS3Pro EVO is an evolution, not a revolution- a scaled up, more capable MS3Pro due to shared technology with big brother, MS3Pro Ultimate. EVO does not have peak and hold injector drivers, but it d...
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MS3Pro ULTIMATE Standalone Engine Management System
$1,499.00
Experience The ULTIMATE.Developed from the MS3Pro 1st Gen platform, the Ultimate brings NEXT LEVEL capability to MS3Pro's staggering feature set beginning with a new high quality aluminum IP65 rated, water resistant enclosure. The Ultimate provide...
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MS3Pro EVO Standalone Engine Management System
$1,249.00
Introducing MS3Pro EVO. (supersedes 1st Gen MS3Pro)MS3Pro EVO is an evolution, not a revolution- a scaled up, more capable MS3Pro due to shared technology with big brother, MS3Pro Ultimate. EVO does not have peak and hold injector drivers, but it d...
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MS3Pro Standalone ECU with 8′ Wiring Harness
$1,199.00
IMPORTANT PRODUCT UPDATE** MS3Pro-Pkg1 has been discontinued and superseded by MS3Pro EVO effective May 1, 2017. This product page, including documentation, downloads & product FAQ tabs below, remains active for archive purposes. Compare MS...
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MS3Pro ‘Drop On’ 24x LS Plug and Play Harness w/ ECU – 1st Gen
$1,699.00
IMPORTANT PRODUCT UPDATE** MS3Pro (1st Gen) has been discontinued and superseded by MS3Pro EVO effective May 1, 2017. This product page, including documentation, downloads & product FAQ tabs below, remains active for archive purposes. Compare...
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MS3Pro ‘Drop On’ 58x LS Plug and Play Harness w/ ECU – 1st Gen
$1,699.00
IMPORTANT PRODUCT UPDATE** MS3Pro (1st Gen) has been discontinued and superseded by MS3Pro EVO effective May 1, 2017. This product page, including documentation, downloads & product FAQ tabs below, remains active for archive purposes. Compare...
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AMPEFI Transmission Controller with 4L60E Subharness
$499.00
AMPEFI 4L60E Plug and Play Transmission Control Seamlessly control your 4L60E transmission with AMPEFI Transmission Control! The supplied 4L60E subharness provides a simple, plug and play integration with MS3Pro and directly mates with our LSx drop ...
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MS3Pro 8ft Wiring Harness
$249.00
8 foot (2.4 m) flying lead type harness for the MS3Pro. It has the MS3Pro's AMPSEAL connectors on one end and the other end is unterminated for installing your own connectors. This harness uses TXL high temperature automotive grade wiring. Wires are indiv...
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MS3Pro Logo T Shirt- Pink Ladies
$15.00
'Official' MS3-Pro Pink Ladies Cut Logo T Shirt, available in various sizes! MS3-Pro: Advanced Power Management
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IGN-1A Race Coil
$67.00
Looking for a high powered ignition system? The IGN-1A Race Coil is designed to put out 103 mJ per spark, with a longer spark duration (2.9 ms) than what you'd see with a capacitive discharge.IGN-1A Race Coils feature a built-in 19 amp IGBT ignitor...
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MAP – GM 3 Bar MAP Sensor
$64.00
Standard GM style 3-bar MAP Sensor (Manifold Absolute Pressure Sensor), compatible with the MS3-Pro and all flavors of the MegaSquirt EMS / MicroSquirt EMS. Assembled in the USA, unlike the current Delphi production.Calibration is linear with 1.1 k...
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