The Bullet Speed Quad conversion, first of its kind!  direct bolt on... NO WELDING REQUIRED.  designed with impeccable precision and creative focus to details.  independent rear suspension, Formula 1 inspired push rod/rocker LSD TRACTION for your high HP/TQ Slingshot .  This kit features  an inboard brake system to eliminate spring weight, Bullet Speed billet aluminum rear differential cover with cooling fins to dissipate heat from the rear end,  3.53:1 gear ratio (custom ratios available upon request) with Wilwood brakes and Hyperpro Shocks.