DIY Racer Swap Kit

The only significant difference with our new low cost flywheel adapter is that it is not a bolt-on solution like our normal adapter. This new version requires the end user to modify their existing Miata flywheel. Don't worry, no machine shop or specialty tools required. You'll need a drill press, and a 7/16” drill bit. Instructions are included with the kit. This is essentially the same piece we have been running on our race car for two years.

This kit also does not include any fasteners. They can be re-purposed from existing Miata nuts and bolts, and Ecotec nuts and bolts. There is a list included with the swap kit of which fasteners are required at each location. You may have to buy some of the required fasteners.

We don't include any intake components, any adapter fittings, sensors, hoses, clamps, etc. Again, this is designed for race use, which means you have your own gauges, which have their own sensors. You probably don't have a heater box, so no need for our hoses. You will probably rig up some sort of cold air intake and catch can, so no need for our MAF tube and air filter. This kit is designed around the 2002-04 J-Body L61 engine. You can use any other variant of Ecotec such as the LE5, LAP, LAF, etc with the caveat that you may need to make spacers for the thermostat housing, or source a thermostat housing from the J-Body L61. Pictures, and part numbers are included in the kit instructions.

You can still use the factory GM ECU without our MAF tube if you tune it to run without the MAF sensor. Alternatively, you could run any other aftermarket ECU you choose. For example, if you are using an L61 engine, there is no reason you couldn't re-use the MS2 ecu you probably already have in your Miata.