OS Giken 1.5way Limited Slip Differential. Thanks to Hideki Nakayama at DECK Mech. in Nagoya, Japan. Uses Redline 75w195 NS oil
Look closely and you can see the diamond shaped cam gear that locks into place when throttle is applied, accelerating both tires evenly. There are 28 plates internally that lock up completely and fully compared to kazz's 24 and nismo's 20.
Stock s13 diff housing, ring and pinion.
S15 GT2560R Turbo, good for 330hp. Bolted to HKS prototype manifold.
RIP Matt Davies