PHANTOM GRIP XTREME UNIT The Phantom Grip Limited Slip conversion kits install into your non-lsd differential converting it into a proven and competitive limited slip differential that enhances your traction needs. Phantom Grips 2-way LSD will considerably improve handling in daily driven, street/strip warrior, or full race vehicle. Every Phantom Grip is constructed of only the highest-quality hand selected materials. With over 500,000 miles of vigorous professional performance testing (SCCA, drag, rally, hill climb, ice, rain, etc.), we have been able to fine tune each application through specific heat treating and rockwell testing to achieve maximum performance and reliability. Each Phantom Grip unit is assembled with pressure tested matched sets of progressive-rate springs to achieve equal load distribution to the disc plates, which dramatically enhances reliability and performance. With such a passion for perfection, we at Phantom Grip are confident that when you choose a Phantom Grip unit, you are choosing, by far, the best limited slip conversion kit on the market.