For street usage and convenient shopping, we offer the Wavetrac 02M. Torque actuation is roughly on par with the Peloquin alternative. However, it's also more internally tunable than either for tarmac, street, or strip events. (Peloquins are fixed.)
The Wavetrac® 10309190WK behavior can be altered during tear down suit your needs. It comes standard with carbon fiber bias plates for the best all around performance. Interchangeable plates using materials with different friction coeficients to fine-tune the bias ratio are sold separately. These friction plates provide a mechanism to tune the response of the differential as a function of applied torque load. (Reality check: This adjustment requires specialist skills and knowlege and is rarely done.)
Note: Shipping is always done from a CA warehouse.
Note2: You'll need an ARP Ring Gear Bolt Kit and also Differential Bearings to complete installation. (Peloquin includes these items.)