I couldn't find Sika 227 in the states when I did mine but I did find either 225 or 221 on amazon, in black. I tried to stay away from silicone, have used it before, hated the off-gassing it did, but if you get something that is sensor-safe IE won't damage your maf/intake sensors, should be fine. Whatever you get use as much as possible for large connections and between the neck plate and the A pillar. Bonus for the sika is it is ridiculously sticky.