Bullet Speed's Slingshot Quad Conversion Kit.  Bullet Speed has proven to be a leader in innovation over and over again.  If there is one thing that shows our capabilities it is this direct bolt-on Quad Kit.  Zero fabrication is required!  With Formula 1 inspired Push Rod/Rocker IRS rear suspension. Infinity G35 3.53:1 Limited Slip Rear Differential. Multi-color options like subframe color, upper and lower control arms, push rods, Bullet billet rear differential cover and Bullet Speed billet bearing blocks. Completely illiminate your angle drive.  This kit is coupled with a Bullet Speed custom drive shaft.  The Wilwood 12.1-inch disc brakes are mounted inboard, meaning the brakes don't travel up and down with the wheels keeping the spring rate low.  We offer 2 different shock options. The base kit is equipped with two-way adjustable Yamaha R1 shocks with piggyback reservoir. And the Bullet Speed R-Spec kit features Billet Hyperpro 461 two way adjustable shocks with piggyback reservoir. (shown bellow) 100% of this kit is made in our state-of-the-art facility in Holiday, FL. Installation is included in price. If you think your Slingshot gets attention with 3 wheels.... This Quad setup doesn't turn heads.... It snaps necks!  Below is the Bullet Speed Prize Fighter called "THE SILVER BULLET"  We do Customs!