The Metal Diff BOOST Box is recommended for any of the following ARRMA 4X2 MEGA BOOST basher vehicles after upgrading to 3S brushless power using the complete 3S Brushless BOOST Box or Metal Slipper Power Module BOOST Box plus a suitable brushless system

and the aluminum build adds strength over the stock plastic part

O-ring exhaust gasket

Precision-fit laser-cut wood parts make this kit fun and easy to assemble

Powerhobby Motor Mount Upgrade Titanium Screws

Kyosho 97045B Muffler Gasket (21-28 Class/5pcs) DBX Parts The Metal Diff BOOST BoxKyosho 97045B Muffler Gasket (21 28 Class 5pcs) The Kyosho 97045B is a set of five muffler gaskets sized for 21 28 class nitro engines, offered as a genuine Kyosho replacement part. These gaskets seal the connection between the engine and muffler, helping prevent exhaust leaks that can hurt performance. Genuine Kyosho part, SKU 97045B Muffler gasket Sized for 21 28 class engines Includes 5 pieces