Singapore Airlines KrisFlyer - Arrivals lounge in SIN?

Does SQ have a land-side arrivals lounge in SIN? That is, someplace to take a shower AFTER getting baggage and clearing customs. Would be flying business class on SQ.

Nope.

Most hotels can accommodate early arrivals, or at least provide you with a place to shower and change if your room can not be provided. There are only airside showers at SIN, which can be used on an hourly basis. While your bags will be delivered quickly to the customs area, they are pretty safe if you take your time getting down to clear immigration and customs. Of course, if you are connecting, there is no need to collect your bags and go landside, so you can always use the SilverKris business lounge/showers.

There's a public shower room on the same floor as the Kris Lounges but no towels. I don't know if it has running hot water, though.

If you have a PPS card, getting into a Kris Lounge after a flight is not that much of a problem, though.