MegaSquirt Engine Management & Fuel Injection by DIYAutoTune.com

Limited Lifetime Warranty on Every MS3Pro Ultimate & EVO Purchase

Perhaps the most valuable standard feature yet!

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Introducing the new MS3Pro EVO Engine Management System

Faster Datalogging, more VR & analog inputs, on-board 4bar MAP and baro… plus so much more!

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MS3Pro Plug & Play for Chevy LSX

Available now for MS3Pro Ultimate & EVO, just choose your injector connectors and get to tuning!

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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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4L60E & 4L80E Plug & Play Transmission Control

The versatile MicroSquirt can control 4L60E & 4L80E transmissions with just a few clicks! No wiring necessary.

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Featured Products View All

MS3Pro 1984-1987 Buick Grand National Plug and Play
From: $1,429.00
The MS3Pro Buick Grand National Plug and Play (P/N: MSPNPPro-GNX8487) Fits 1984-1987 Buick Regal with the 3.8 Turbo V6, including Grand National, T-Type, and GNX. Buick Grand National Plug and Play Model Features: Fully Plug and Play Installation ...
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IGN1A Smart Coil
From: $71.00
The IGN1A Smart Coil by AMP EFI requires no CDI Ignition Module to produce 103 mJ per spark, with a longer spark duration (2.9 ms) than what you'd see with a capacitive discharge. They are the same monster coils used in Street Outlaws No Prep Kings conten...
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MS3Pro EVO GM LS 24x Plug and Play
From: $1,749.00
MS3Pro EVO GM LS 24x Plug and Play includes an MS3Pro EVO ECU, TunerStudio software and the most rugged & durable GM 24X custom harness. Experience the MS3Pro EVO. MS3Pro EVO is an evolution, not a revolution- a scaled up, more capable MS3...
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MS3Pro EVO GM LS 58x Plug and Play
From: $1,749.00
MS3Pro EVO GM LS 58x Plug and Play includes an MS3Pro EVO ECU, TunerStudio software and the most rugged & durable GM 58X custom harness. Experience the MS3Pro EVO. MS3Pro EVO is an evolution, not a revolution- a scaled up, more capable MS3...
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MS3Pro Ultimate Standalone Engine Management System
$1,499.00
Experience the MS3Pro ULTIMATE by AMP EFI, featured in Street Outlaws No Prep Kings contestant, The Hulk. Developed from the MS3Pro 1st Gen platform, the MS3Pro ULTIMATE brings NEXT LEVEL capability to MS3Pro's staggering feature set beginning with a...
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MS3Pro ULTIMATE by AMP EFI
$1,349.00
Experience the MS3Pro ULTIMATE by AMP EFI, featured in Street Outlaws No Prep Kings contestant, The Hulk. Developed from the MS3Pro 1st Gen platform, the MS3Pro ULTIMATE by AMP EFI brings NEXT LEVEL capability to MS3Pro's staggering feature set begin...
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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. MS3Pro EVO does not have peak and hold injector drivers, b...
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MS3Pro EVO by AMP EFI
From: $1,099.00
Introducing MS3Pro EVO by AMP EFI (ECU only) MS3Pro EVO by AMP EFI is an evolution, not a revolution- a scaled up, more capable MS3Pro due to shared technology with big brother, MS3Pro Ultimate. MS3Pro EVO by AMP EFI does not have peak and hold inj...
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MS3Pro ULTIMATE GM LS 24x Plug and Play
From: $2,049.00
MS3Pro ULTIMATE GM LS 24x Plug and Play includes an MS3Pro ULTIMATE ECU, TunerStudio software and the most rugged & durable GM 24X custom harness available. Experience the MS3Pro ULTIMATE. Developed from the MS3Pro 1st Gen platform, the Ulti...
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MS3Pro ULTIMATE GM LS 58x Plug and Play
From: $2,049.00
MS3Pro ULTIMATE GM LS 58x Plug and Play includes an MS3Pro ULTIMATE ECU, TunerStudio software and the most rugged & durable GM 58X custom harness available. Experience the MS3Pro ULTIMATE. Developed from the MS3Pro 1st Gen platform, the Ulti...
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GM LS 24x Plug and Play Engine Harness-ULTIMATE EVO
From: $799.00
For MS3Pro ULTIMATE/ EVO plug and play installation on GM LS engines with a 24x crank trigger. The MS3-Pro 24x LS Plug and Play Harness is the highest quality, best value option for LS Motors in the industry today. Save your hard earned time and mone...
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MS3Pro ‘Drop On’ 24x LS Plug and Play Harness w/ ECU-1st Gen
From: $1,699.00
For MS3Pro 1st Gen plug and play installation on GM LS engines with a 24x crank trigger. The MS3Pro 24x LS Plug and Play Harness is the highest quality, best value option for LS Motors in the industry today. Save your hard earned time and money whil...
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