TR02 (EFRA2165) is a new muffler for 1/8 on-road racing. TR02 is designed for high-grip tracks and technical tracks,

 in which low-middle range power is frequently used. The complete set is equipped with MR02 manifold, which has quicker response in low-middle range.

 So we are having two types of mufflers in 1/8 on-road category; TR01 (a.k.a. T-2080) EFRA2098, which has better performance in top speed, 

and TR02 in better performance in low-middle range. Make a choice according to track conditions.