Creating a Mounting Plate

Because zip ties, like the ones used in the mockup wouldn't be safe to use in the real world it is necessary to try and create a way for the coils to be mounted on the OEM bracket. What I did here was take a sheet of aluminum, trim it, and then drill out a few holes.

I then used the coils to align where on the mounting plate I would have to cut so that the mouting tabs on the coils would go through the plate and I could use another screw dowel to secure the coils.

Mounting Coils To Bracket

Now that the coils have been mounted on the plate, we can mount the plate to the OEM bracket. If all of the measurements are correct, the plate should sit right on the OEM bracket nice and snug. A few nuts were used to die down the plate to the bracket.

Creating The Spark Plug Wires

The OEM spark plug wires will not correctly mate with the newer coils. To resolve this issue you can either buy a set of LS2 spark plug wires or make your own custom set. This is not a very difficult task, and can be completed in just a few steps. I decided to use a standard length of 16" to make each wire, this way making sure I have enough slack for each coil.

The first step is to strip a little less than 1/4" off of the strand of wire. This will expose the core of the wire that will be used to bond to the boot contact.

The next step is to fold back the core of the wire, and place the contact on the wire, and give the contact a light pinch to gently mount the contact on and ensure that everything is lined up properly.

Once you have confirmed that the core is properly folded back, and centered with the back side of the boot contact, you can go ahead and use your crimp tool to tightly crimp the contact to the wire

Now we can go ahead and slide the wire into the boot. To make this job easier, you can use some WD40 to lubricate the interior walls of the boot. This will allow the wire to slide in with far less force.

It is very important to make sure that the contacts are facing the correct direction, especially on the spark plug boots. If you applied enough WD40, you should be able to turn the wire to the proper alignment

Continue to do this for each wire and each end

Assembling Everything

Now that all of the wires have been created, we are ready to assemble everything together to prepare for installation. If you ordered the RX8 to LS2 harness, this job becomes very easy as all the coil plugs snap right in.

Installation

The final step is to install the coils which entails in the removal of the stock airbox, or aftermarket air intake system. This will give you access to the OEM coilpacks and bracket. The bracket is held in by 2 screws and a nut.

With the OEM coils and bracket removed, we can install the custom bracket in the same location. Because I used the OEM bracket to mount my new coils, there should be little to no fitment issues, and the mounting holes should line up.

Once the new coils are mounted, the harness is pluggeed in, and the plug wires are installed, we are ready to button her up and take her for a test drive. Before putting everything back together, I placed the intake box back, and reconnected the MAF so that I could test to make sure the car runs without an issue. After confirming, everything goes back into place like OEM.