the cover will need to be reworked. I ran into over heating with my .21 inside my MM18. I opened up the cowl ,got some air to flow thew the hull. Ran great until i put the cover on. I also had a Huge Cooper QP inside. too much heat. I went with a reg pipe You got always to go first. Have fun. I picked up a Traxxas Slash truck. We race at Fulton Redneck RC Thursday night. My Skill level is coming along.I did a FIRST. on the first heat. I had a DMF on the second run. My battery died