Belt slip on an 8th or 9th Gen Civic Si Rotrex setup kills power and wastes boost. MDP's Rotrex Upgrade Face Plate is machined from 6061 T6 billet aluminum and increases belt wrap around the Rotrex pulley — more contact area means better grip and reliable power delivery at the supercharger. Designed for direct top mount fitment on C30/94 Rotrex models with K20 and K24 Civics. Key Features CNC-machined from 6061 T6 billet aluminum Increases belt wrap on Rotrex pulley — eliminates belt slip Direct top mount fitment for C30/94 Rotrex models Fitment Honda Civic Si 8th Gen (2006–2011, K20Z3) with Rotrex kit Honda Civic Si 9th Gen (2012–2015, K24Z7) with Rotrex kit Note: This is the upgrade bracket face plate only — not a full Rotrex kit. Hardware, fitting kit, and supercharger sold separately. Designed and manufactured in the USA by MDP Florida.