Villain is 20/13/3b of 2.8%/fold to cb of 35% over 600 hands. I haven't seen him take this line until now.

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (UTG) ($123.80)
MP ($53.95)
CO ($69.25)
Button ($21.30)
SB ($76.15)
BB ($116.10)

Preflop: Hero is UTG with 8, 9
Hero bets $2, 4 folds, BB calls $1.50

Flop: ($4.25) 4, 9, 8 (2 players)
BB checks, Hero bets $3.35, BB calls $3.35

Turn: ($10.95) K (2 players)
BB checks, Hero bets $6.45, BB raises to $19, Hero ?