Originally Posted by tuna

Fb20 is not turbo friendly afaik currently, nothing like the ej20 yet, give it time i reckon,

They probably have a good reason they arent doing factory turbo just yet!

Originally Posted by wiki

Subaru FA engine
The FA shares little in common with the FB engine, with a different; block, head, connecting rods, and pistons. The FA also features direct injection (from Toyota) and variable valve timing. It is used in the Subaru BRZ. A Toyota variant known as the 4U-GSE is used in the Toyota 86 and the Scion FR-S.[6]

• Bore: 86 mm
• Stroke: 86 mm
• Displacement: 1,998 cc
• Compression Ratio: 12.5:1
• Power: 200 PS (147 kW; 197 hp) at 7,000 RPM
• Torque: 20.9 kg·m (205 N·m; 151 lb·ft) at 6,400-6,600 RPM

A version with direct fuel injection and twin-scroll turbocharger was introduced in 2012 to the Japanese market for the Legacy GT DIT.

• Bore: 86 mm
• Stroke: 86 mm
• Displacement: 1,998 cc
• Compression Ratio: 10.6:1
• Power: 300 PS (221 kW; 296 hp) at 5,600 RPM
• Torque: 40.8 kg·m (400 N·m; 295 lb·ft) at 2,000-4,800 RPM