Clutch Masters · New
Clutch Masters Engine Adapter Plate for Honda K Engine to Subaru STI 6-Speed Transmission
MPN K721-EAP · Store SKU clmK721-EAP
Supplier stock checked 11/7/2026, 4:35:30 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
What are your thoughts, should Subaru's come with a K20/K24 motor or should Honda's be equipped with an AWD system similar to Subarus? Regardless, this adapter plate kit will allow you to bolt up Honda's K series motors to a Subaru EJ transmission (5 or 6-Speed). This kit utilizes the factory Honda starter and includes a cover plate to cover the starter hole on the Subaru transmission. This allows you to utilize a RWD K series wiring harness without too much fuss. We made the adapter plate 1" thick which allows us to make a single disc flywheel that uses an OE style Subaru STi 6-Speed clutch kit. We also offer a twin disc flywheel that will let you run one of our 850 Series twin discs for those wanting to make high horsepower. Adapter plate kit comes with all hardware needed to mount everything together. This kit angles the Honda K motor at the factory angle of 11 degrees to the passenger side. Honda K Engine to Subaru Transmission
Manufacturer fitment & guides
Check K721-EAP against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
More from Clutch Masters ↗See the JuiceBuilt workshop ↗