Wossner Piston & PEC Rod Package Impreza WRX STI EJ25

All Wossner Forged Con Rods are made in Germany. Constructed from 4340 Forged steel, featuring an 'H' beam design, they can withstand extreme load and high RPM levels which makes them a worthwhile addition during your engine rebuild. They are supplied as matched full engine sets within +/- 1.5grams and include ARP Bolts.

Wössner are regarded by Europe’s leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress’s of competition life.

Wössner pistons feature a unique Moly coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances.

The crowns of the pistons are also mirror polished to better resist detonation on a high performance engine. Mirror polishing allows a more even spread of heat inside the chamber which will help prevent “hot spots” on piston crowns. Price includes all piston rings and gudgeon pins.

Please state piston size at checkout (86mm / 86.5mm / 87mm)