Mahle pistons were designed as a completely finished drop in forged piston assembly. Other than filling the included performance piston ring set, everything is done for you. Mahle has over 80 plus years of piston manufacturing making pistons from OEM to formula 1 racing. Mahle uses only the best technology to make these pistons. Mahle pistons come standard with anti-friction skirt coating for reduced drag. Forged from 4032 low expansion aluminum alloy for high strength and reduced piston to wall clearance. Forced Pin Oiler is used for increased wrist pin lubrication. Pin bores are CNC precision-machined. 23mm High-Quality Steel Wrist Pin (123g), Performance 1.2, 1.2, 2.5mm performance ring set, steel nitrided top ring, and Race Proven Round Wire Locks are included.

Compression Ratio with 49cc Heads 8.3:1.
Replaces part number SUB193661I16

Vehicle Make	Subaru EJ20
Bore Size	93.00mm
Crankshaft Stroke	3.110
Rod Length	5.138
Piston Type	Dish
Compression Height	1.193
Piston Material	4032 Forged
Piston Ring Size	1.2 1.2 2.5mm
Wrist Pin Size	23mm