The Z34 OEM diff cover uses a single stud at the rear which is prone to breakage in high grip/hp setups. We make a diff brace which does help but a dual stud cover is the ideal solution.

The GKTECH Z34 Extended dual stud diff cover has been designed for use in dual stud configuration but unfortunately, the subframe doesn't have a provision for a second stud which is why we've made the option of either a bolt in or weld in secondary bush. 

For those who already have a solid diff bushing installed, we've made it possible to order only the secondary bush itself - with options for solid OR polyurethane bushings, including an all NEW weld in polyurethane option. For best results we recommend use with dual solid diff bushes. 


NOTE #1: Primary bushings are sold as a 3pc set and include the bushings for the front ears of the diff. 
NOTE #2: Using a solid bushing as the primary bush requires use of a solid secondary bushing etc.
NOTE #3: Steel weld guide is optional as we do include a cardboard template with the diff bush.