I also had an old 615Sti and loved it. The module was small enough to hide in my Honda Civics ash tray. What year V1 did you have. The new one is pretty small. It's actually smaller than the Escort X50 and Bel RX65 in size. It's a tad wider in the front because of the 2nd radar, but it's thinner and shorter than the ones mentioned above. Truthfully, other than V1, Escort and Bel, no others are worth having.