Duratec HE 1.8/2.0/2.3/2.5 to RX8 adaptor plate

This adaptor plate will allow you to fit a 2004-2008 Mazda RX8 5 or 6 speed gearbox behind your 1.8/2.0/2.3 or 2.5 Duratec HE engine.

This will not fit the 2.3 I4 Galaxy engine that is often referred to as a Duratec but isn't.

The plate is laser cut to ensure accuracy and repeatability so all adaptor plates are manufactured and fit the same.

The top two countersunk holes are used to align the centre line of the adaptor plate to the centre line of the crankshaft. The plate is supplied with the four countersunk M10 screws. Two are for the top for alignment and the other two are required as they would clash with the gearbox.There are 2 dowels welded into the adaptor plate that then line the gearbox to the crank centreline that are tapped to accept fixings.

Your gearbox will need notching slightly to clear the nose of the starter.

With this adaptor plate you will need the 2.0 MX5 Mk3 flywheel, starter and clutch. But with a pinto 215mm 1”x23 spline friction plate. 

If using the standard RX8 hydraulic slave cylinder, you will need to remove some of the webbing on the engine. You can see this in the attached picture.

This setup can also be converted to a cable operated clutch or a hydraulic concentric release. Click below for the cable setup or go to the Hydraulic concentric release kit in the product pages.

Cable clutch conversion kit for this setup is: 5 Speed or 6 Speed