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These Limited Slip differentials will launch better and never lock up. This is because unlike a conventional LSD which has a set preload, these units constantly adjusts the torque away from the slipping wheel toward the other axle. 
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Paramount Performance 8.8 HEMI Axle Upgrade: Introducing the new Driveshaft Shop SRT8 9" Rear Conversion. The Drive Shaft Shop borrowed George Kooks' 300C SRT8 for the prototype and their happy to say the kit is a success. The kit will come complete with 9" rear housing (bare housing), front mount, rear weld in mount, custom 1400HP rated 31 spline diff stubs and true 1400HP axles that do not use any “Factory”or "used parts". The outer CV is a Extreme built Billet CV with fully REM... 
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Weight:75.0 lbs
HEMI LX LC Rear LSD Add this Rear clutch style Limited Slip Differential to your HEMI powered LX or LC. Featuring a variety of gear ratios for faster acceleration and better launches. With this kit, your HEMI will be able to handle the huge wheel horsepower and torque numbers your HEMI puts down. The kit comes with everything needed to to install the LSD. Two 1000+ HP axles, a 8.8 rear limited slip differential, two heavy duty hub assemblies, a set of tone rings, and a custom... 
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Weight:70.0 lbs