Silber Turbo Kit — Harley-Davidson M8 Road Glide / Street Glide (2023.5+ 117)

Transform your Harley-Davidson M8 into a turbocharged monster. This complete bolt-on turbo kit is engineered for the 2023.5+ Road Glide and Street Glide running the 117 M8 motor — premium components, dyno-proven gains, and a straightforward bolt-on install.

Real, Dyno-Proven Power

• A stock 117 M8 lays down roughly 90–93 HP and 110–112 ft-lbs to the wheel.
• With the Silber kit at 7 psi of boost on 91-octane pump gas: 145–160 HP and 140–155 ft-lbs to the wheel.
• Step up to an SE 511 cam for even bigger gains, with more camshaft options coming as the aftermarket catches up.

What's in the Kit

• Garrett turbocharger
• Stainless steel V-band exhaust housing
• Turbosmart 40MM external wastegate actuator
• Stainless steel exhaust manifold (engine to turbo)
• Stainless steel 3" exhaust with muffler — includes black and polished tips for customization
• Two sets of removable heatshields (brushed stainless and black coated)
• Custom-molded silicone intake hose
• CNC billet aluminum airbox (finned plenum), anodized black
• CNC billet cam cover plate
• All necessary hardware, gaskets, and fasteners for a clean bolt-on installation

Tuning & Turbocharger Options

• Tuning: Add a Thundermax ECU or Impact Wiring Solutions ECU, or choose None to run your own tuner.
• Turbocharger: Garrett or KPA.

Why Riders Choose the Silber Turbo Kit

• True bolt-on: Owners consistently report a straightforward installation following Silber’s step-by-step instructions — all hardware, gaskets, and fasteners are included.
• Real power on pump gas: Dyno-proven 145–160 wheel HP at just 7 psi on 91-octane — no race fuel needed to wake it up.
• Quality components: Genuine Garrett (or KPA ball-bearing) turbocharger, stainless manifold and 3" exhaust, and a Turbosmart external wastegate.
• Instant spool & that turbo sound: The ball-bearing-style turbo delivers quick boost response and the unmistakable turbocharged note.
• Proven platform: Built on Silber’s established M8 lineup (103/114/117 kits), all tested with strong, repeatable numbers.

Note: This product is designed and intended for off-road or race vehicles only and not for use on vehicles that are subject to emissions requirements or for use on public roadways.