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MaxSpark PNP 90-05 IGN-1A Coil Ignition System


Product Description

High-performance Miata builds need high-performance ignitions; the stock coils typically won’t cut it if you’re running a lot of boosts or otherwise increasing the cylinder pressure. And even nearly stock engines can see a smoother idle with ignition upgrades. Mazda builders have tried a lot of different ignition upgrades to get more spark, swapping on anything from GM truck coils to coils off a Toyota Camry. But these are only small upgrades, and they don’t address some of the real issues. Our IGN1A coils will produce a very hot spark and work great on these cars, but installing them on a Miata has typically meant fabrication and custom wiring.

Until now.

This kit does for the IGN-1A what the MSPNP line does for the MegaSquirt: an easy, turn-key upgrade for your stock Miata ignition! You get a substantial ignition system upgrade on your Miata with no cutting or splicing wires, no extra parts to buy, and no need to cut any sheet metal or even drill any holes. This kit includes everything you need: Coils, mounting hardware, a wiring harness that plugs into your stock wiring, and high-quality spark plug wires.

And we’ve addressed one of the major weak points in the NA and NB Miata ignition system: Voltage drop. The Miata power wiring is undersized for sustained high RPM use, and it’s certainly undersized for high-energy coils. Our MaxSpark harness solves these issues by adding a dedicated ignition relay controlled 50 amp ignition circuit and does so Plug and Play. This allows for minimal voltage drop to the coils AND it takes all of the load off the Miata factory wiring and main relay.

These coils are as hot as they get! These are race coils that can handle up to 19 amps of current, with twice the spark energy of the hottest OEM coil we’ve ever tested. They don’t have any unwelcome features like the GM truck coils’ over dwell “protection” that advances your timing if you run too much dwell (and why would you want to burn down an engine to protect an ignition coil?). No OE ignition coil solution is anywhere near as capable as the IGN1A, and we’ve made it PNP for you. There is a reason why these are the preferred coils in ProModified race cars.

But even with all their spark energy, these are very reliable coils – they’ll typically last for years of racing.

Note that from 1990 through early 1995 Miatas will need to use either an aftermarket tachometer or a dedicated tach output from a standalone ECU. But if you need this kit, you probably will have a standalone ECU anyway. If you still need one, we can help with that too.

Don’t settle for a minor upgrade that will let you run a few more PSI – go for a MaxSpark kit, open up those plug gaps, and have a Miata ignition powerful enough to support anything!


  • The kit utilizes the AMP EFI IGN1A ignition coils that put out over 100mj (nearly 2X more energy than the leading competitors) per spark event
  • Made of TXL high temp automotive grade wire
  • Color-coded and printed wire with the corresponding spark output
  • Flame retardant looming
  • Labeled heat shrink for connector identification
  • Top of the line weatherproof automotive relay
  • Multi-point grounding design
  • Pre-painted coil mounting bracket
  • Direct Plug-N-Play for OEM wiring setups
  • Capable of aftermarket wiring connectivity
  • Allows for wasted, coil on plug, sequential, and many more firing capabilities
  • Step-by-step installation instructions
  • Designed to be tucked for a professional and appealing look when installed

What’s in the box?

  • 1X Maxspark primary harness
  • 1X Maxspark secondary harness (model year specific)
  • 1X Sequential adapter harness
  • 4X AMP EFI IGN1A Ignition Coils
  • 1X Coil mounting bracket
  • 1X 50AMP fuse
  • 4X Bracket spacers
  • 4X Long bracket bolts
  • 8X Short Coil bolts
  • 12X Washers
  • 4X Spark plug wires

FAQ: Can I run this with my factory ECU?

Yes, this kit was designed to be a direct plug and play for OEM setups. This is an important part of your purchase when making the “model year” selection because the OEM connectors differ for certain years.

What equipment will I need for installation?
The entire install can be completed with a 10mm socket, 10mm wrench, 12mm socket, 12mm wrench, side cutters, electrical tape (if desired), and zip ties (if desired). These are the only tools needed for the installation of the kit.

To remove your existing ignition setup, you may need additional tools other than the ones listed above.


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