Two speaker systems available, depending on your chassis type:
 
The early, pre-sound units use the Life-Like Proto 1000 C-Liner speaker in both the 4 and 5-axle C-Liners, with both the stock 8-pin and 21-pin PCBs.
 
The later sound-ready units use the RAPO-E8XR in the rear position and the RAPO-E8MR in the front position. In both cases, you need to remove the screwed-in mounting rings and use mounting tape to secure the SSS speakers.
 
The speakers come fully assembled and tested.
 
Dimensions are: 14mmH x 22mmW x 45mmL