Losi/GRP Non-Tuned (Standard Plug) .21 vs the Tuned (Turbo Plug) .21
 

Hi, it is time to get some new race engines and I am debating on trying out the GRP line. I am currently running both truggy and buggy and would prefer to run the same motor in both (Clutch/pipe tuning for the bottom end on the truggy). Curious on what the difference is between these 2 as I can get a killer deal on the standard non-tuned version. I would also consider getting the turbo button to run the turbo plug on it.