RB – Protect engine.
Front bearings are not 100% hermetic and let dust get inside the engine. Both bearing and engine suffer and wear out prematurely, thus creating many problems as compression losses, flaming out and expensive repairing costs. RB studied this problem and developped a solution: the Engine Protect! This machined and treated steel part only weights 2,4 grams and fits most of the .21 and .28 engines. It protects the bearing by preventing dust from getting in, thus increasing engine lifetime and performance. A great improvement at an affordable price !
Recommended for Buggy, Truggy and 1/8 On-Road on soaking wet track.

Fonte: www.rbproducts.com