Replacement 4TH gear for type-r ratio K series gearboxes .
This will fit
Civic ep3 type-r
Civic fn2 type-r
Civic fd2 type-r
Integra dc5 type-r
Accord cl7 euro-r
Kswap cars with a gearbox from the above
Genuine Honda part
All Honda gears in the gearbox use 2 gears per gear , this is the half which gets damaged in the synchromesh area