Steeda Autosports has once again taken the S550/S650 Mustang to the next level of performance and comfort with our exclusive Adjustable Urethane Differential Mount Bushing Insert System for all 2015+ Mustangs! When our engineers sat down to design this kit, we had to come up with a way to increase performance without sacrificing too much drivability and preserving the cars street manners per the driver's preference. Unlike our competitors' kits that take 3-4 hours to install and force you to permanently modify the rear IRS suspension with a Sawzall, Steeda's does not! Steeda's kit installs in under 1 hour, is adjustable and can be easily removed - it simply doesn't get any better than this! Minimize pinion angle changes, increase traction, eliminate wheel hop and differential deflection with Steeda's new kit. Made from high-strength urethane to Steeda's exact specifications and durometers, our kit comes with 2 different bushing options - our red 'street' 80 durometer bushings and our black 'performance' 90 durometer bushings. Both bushing options will increase performance while the red bushings offer the least increase in NVH as compared to the black. Like all kits on the market, our kit can add noticeable NVH due to increased transfer of gear whine noise problematic to some Super 8.8 IRS differentials. Steeda's kit adds the strength and support the OEM bushings need to perform the way our customers intended. Once again, this is not a permanent modification - there is no drilling, cutting or pressing required. Simply loosen and remove a couple bolts and this kit installs in less than 1 hour. Bushings are included for both the front and rear differential mounting locations. Grade 10.9 hardware is included with zinc-plated washers. Note: For hardcore enthusiasts that want ZERO pinion deflection, try our 555 4440 kit. This kit features aluminum bushing inserts. For race-use only as it will increase NVH and gear noise. Note: This product may increase noise, vibration, and harshness (NVH) after installation. NVH may increase slightly with red/street bushing inserts, but more aggressively with black/performance bushing inserts. This product itself does not generate any additional NVH, rather it transmits existing rear differential noise into the cabin by firming up the OE bushings. Product Benefits Limits IRS differential movement while increasing traction and eliminating wheel hop Adjustable stiffness with red or black bushings Easily removable, not a permanent modification 100% designed, manufactured, and made in the USA Installs in 1 hour or less Also fits the Dark Horse, Mach 1, GT350, GT350R, and GT500 WARNING: California Residents: Cancer and Reproductive Harm; www.p65warnings.ca.gov
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