The VXR has a stronger bottom end than the Astra G but once you get to 330bhp then further engine internal work is needed.
We only supply the finest forged Wössner pistons which 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.
Three sizes are available which is determined by engine number and whether you are wishing to oversize the bore in fitment. We would advise a professional re-hone of the block to fit the pistons.
Fitting time (including honing the block) – 10 hours.