exhaust manifold restrictor plate Naraku adjustable for Aprilia, Beta, Derbi, Rieju

Exhaust manifold restrictor plate. Following any performance upgrades, it may be necessary under certain circumstances to return the exhaust system back to factory mode. With this adjustable Naraku restrictor plate the power can be reduced or restored to original.

Only suitable for original manifold with 52mm hole spacing. Fits Aprilia, Beta, Derbi and Rieju vehicles.