Common Questions


Welcome Enthusiasts

Do You Want Your Order For Free?


Do You Offer International Shipping?

Can I Cancel My Order?

Why Didn't I Receive A Tracking Number Immediately?

Why Did My Order Ship In Multiple Boxes?

My Package Arrived Damaged! What Do I Do?


I Purchased A Product That I Don't Need. Can I Return It?


Do You Offer A Military Discount?


Do You Offer General Automotive Repair Services?

Do You Have A Retail Location?



What Gear Oil Do You Recommend?

For Clutch Based Limited Slip Units, What Is The Normal Service Life?

Why Is It A Bad Idea To Add Additional Static Lockup?

Do You Sell Used Differential Parts?

Do You Offer Fully Built Differentials?

Will My Differential Be Louder After Upgrading The Limited Slip Unit?

What Are Some Tips For Properly Setting Up A Differential?

I'm Setting Up My Differential. Where Can I Purchase Shims?

188mm (Standard)

What 188mm (Standard) LSD Rebuild Kit Should I Choose?

Where Do I Send My Carrier Cap To Receive A Core Refund?

Are There Any Unique Factory 188mm Setups?


ZF S5D 320Z

Do You Have A Shift Pin Install Reference Guide?


Rear Correction Arms

Do You Retain Stock Eccentric Bolts When Installing?

Do I Need To Grease Or Service End-Links?

Do You Offer Replacement End-Links?

Do You Offer Replacement Bushings?