GMK Supply "Cylinder Cozy" Engine Break In Sleeve
[GMK0134]

GMK Supply "Cylinder Cozy" Engine Break In Sleeve
rc parts reviewer - Rating: 4 of 5 Stars! Verified Owner Sunday, May 26, 2013
This works way better than a tire foam or sock. However, on an average 70* day, it will not keep your engine at 200+ degrees, but it does make it a lot easier to get there. This, plus a folded up t-shirt draped over the car and stuffed into the top will keep the temp up and depending on the wind or cool temps, you may need to use some plastic as a windbreaker. Overall, I'm satisfied with the product and view it as a valuable tool because it does make keeping the temp up easier than tire foam or a sock (which does almost nothing), but it would be better if it was "plug and play" all the way to 200 degrees by itself. It is basically a smaller version of the foam insulation thing for beer cans.