O.S. PowerBoost Pipe/Muffler 50/55 Hyper Heli

OS PowerBoost Exhaust Pipe for the 50SX-H Hyper and the 55HZ-H Hyper Helicopter Engines. Features: - Excellent performance from high RPM manuevers to idling and hovering- Polished natural finish aluminum constructionPackage Includes:- OS 50/55 PowerBoost Exhaust Pipe - 3.5x18mm socket head cap screws x 2- Lock washers x 2- Pressure nipple - Instruction sheetSpecifications:- Length: 9.6" (244mm)- Diameter: 1.7" (44mm) at thickest point- Distance Between Muffler Mounting Hole Centers: 1.4" (37mm)- Exhaust Outlet Diameter: 0.35" (9mm) Requires: Silicone caulk to seal muffler to engine to prevent exhaust leak