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MS3Pro & Plug-Play Solutions (74)
Here you will find our top of the line standalone ECU/EFI controller product offerings with the latest and greatest features.MS3Pro is our top of the l...
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Transmission & VVT Control (15)
Our products & accessories to handle late model automatic transmission control and Mazda Miata variable valve tuning.
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MegaSquirt Assembled (42)
Want the power and flexibility of a full MegaSquirt engine management system but don't want to handle the assembly yourself? Then check out our full line o...
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MegaSquirt Kits & Components (185)
If you are looking for the lowest cost, rock-solid, fully tunable EFI and Ignition control solutions available, you've found it! MegaSquirt DIY EFI Un-Asse...
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Sensors & Data Logging (94)
System Sensors & Datalogging Equipment including wideband o2 systems, add-on gauges, EGT measurement and more for use with our MegaSquirt engine manage...
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Solenoids and Outputs (18)
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Fuel Systems (50)
DIYAutoTune.com carries a wide variety of parts to keep up with the fuel needs of just about anything with Electronic Fuel Injection, whether it's an all m...
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Coils & Ignition Systems (20)
Ignition Control Components, Coils & Accessories
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Wiring Components (119)
In this section, you'll find our wiring harnesses, cables, and some of our more popular connectors. We have a special page with crimp-it-yourself Weather P...
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Tuning Cables (6)
Browse our selection of tuning cables which allow you to connect your MegaSquirt engine management system to your laptop for tuning.
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Tools (14)
The right tools make all jobs easier. Browse our selection of crimpers, lead benders, stimulators, jumpers, pin removal tools & more.
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Apparel & Merchandise (15)
Now, you can strut your stuff with MS3-Pro & DIYAutoTune apparel. With several styles to choose from, let your colleagues and friends know that you pro...
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Gift Certificates (5)
We get it... Your name is 'Special Someone' or you want to make someone's day with a DIYAutoTune Gift Certificate.Available in denominations as low as ...
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Package Deals (17)
Our MegaSquirt package deals are a great way to get everything you need to install one of our complete engine management systems on your vehicle without ha...
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Featured Products
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MS3-Pro ‘Drop On’ 24x LS Plug and Play Harness w/ ECU
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 money while experiencing the virtually limitless feature set of MS3-Pro Engine Management System. Si...
Learn More →From: $1,699.00 Select options -
MicroSquirt CAN Transmission Controller with 4L60E Subharness
4L60E Plug and Play Transmission Control via MicroSquirt Seamlessly control your 4L60E transmission with MicroSquirt Transmission Control! The supplied 4L60E subharness provides a simple, plug and play integration with MS3-Pro and directly mates with...
Learn More →$499.00 Add to cart -
MS3Pro Logo T Shirt- Pink Ladies
'Official' MS3Pro Pink Ladies Cut Logo T Shirt, available in various sizes! MS3-Pro: Advanced Power Management
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MS3-Pro Standalone ECU with 8′ Wiring Harness
This is the complete package (part# MS3Pro-PKG1) with MS3-Pro Standalone ECU, all tuning cables, software & manual on a USB drive, and 8′ wiring harnesses. The MS3-Pro standalone ECU can be used with most factory or aftermarket MAP/MAF sensors, al...
Learn More →$1,199.00 Add to cart -
MS3-Pro 8 ft Wiring Harness
8 foot (2.4 m) flying lead type harness for the MS3-Pro. It has the MS3-Pro'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 ind...
Learn More →$249.00 Add to cart -
MegaSquirt-III EMS System with MS3X Expansion V3.57 – Assembled Unit
Complete, ready to run MegaSquirt-III ECU with the MS3X expansion board. 2.5 bar MAP sensor is standard equipment.The MS3 daughter card on its own will give you all these features and more:VE and ignition tables are both 16 x 16 with full interpo...
Learn More →$659.00 Add to cart -
IGN-1A Race Coil
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. They are the same coils used in the Huber Mustang, which mak...
Learn More →$67.00 Add to cart -
MAP – GM 3 Bar MAP Sensor
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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Top Rated Products
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Lead Bending Tool
Lead Bending ToolThis inexpensive lead bending tool will come in very handy when building up your MegaSquirt kit or any electronics kit. It helps you to quickly bend the leads of 1/4 and 1/2 watt resistors, diodes, capacitors, inductors, etc to the ex...
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MegaSquirt Stimulator v2.2 – Unassembled Kit
MegaSquirt Stimulator Board v2.2 - Unassembled Kit; Part # MSStim22-K (For all versions of the MegaSquirt, PCB 2.2, 3.0, and all surface mount 3.57 boards)The MSStim22-K includes all the parts you need to build a Megasquirt Stimulator version 2.2 as...
Learn More →$45.00 Add to cart -
MegaSquirt Relay Board – Unassembled Kit
MegaSquirt Relay Board - UnAssembled Kit Part # MSRelay-KIncludes everything you will need to build your MegaSquirt Relay Board, complete with black anodized case.Though the Relay/Power Board is not required, it is a convenience and reduces the ch...
Learn More →$73.00 Add to cart -
MegaSquirt Stimulator v2.2 – Assembled Unit
MegaSquirt Stimulator Board v2.2 - Assembled Unit Part # MSStim22-C(For all versions of the MegaSquirt, PCB 2.2, 3.0, and the newer surface mount 3.57 boards)The Stimulator board allows you to fully bench-test all standard inputs and outputs on yo...
Learn More →$69.00 Add to cart -
MegaSquirt-I Programmable EFI System PCB2.2 – Assembled Unit
MegaSquirt Programmable EFI PCB2.2 System - Complete Unit Part # MS122-CThe MegaSquirt EFI System is truly the dream Electronic Fuel Injection computer for the DIYer. MegaSquirt has been installed on thousands of engines from restored classics to dail...
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MegaSquirt-I Programmable EFI System PCB3.0 – Assembled Unit
MegaSquirt-I Programmable EFI System PCB3.0 - Assembled Unit Part # MS130-CCompletely assembled including:All 'Basic Components' PWM Flyback Damping Circuit components Hall Sensor/Coil(-) and VR Sensor Ignition Trigger Components (jumpered fo...
Learn More →$365.00 Add to cart -
MegaSquirt-II Engine Management System w/PCB3 – Assembled Unit
MegaSquirt-II Engine Management System w/PCB3.0; Assembled Unit Part # MS230-CThis MS230-C unit is fully assembled using the genuine B&G partial kit with PCB3.0 and all available circuitry options as listed:All 'Basic Components' PWM Flyba...
Learn More →$435.00 Add to cart -
USB to Serial Adapter – Works with TunerStudio!
This USB to Serial Adapter has been tested and works properly with all versions of TunerStudio. We highly recommend this adapter is used if your tuning PC/laptop doesn't have a DB9 Serial connector. Or you can use another adapter with a genuine FTDI c...
Learn More →$22.50 Add to cart
