This is the piston, wrist pin, and rod combination we use in our Pro Drag SR20. Custom Heavy Duty CP 90mm pistons made for a SR20VE head with wrist pin buttons and PVD coated rings. Trend DLC Coated TP1 series wrist pins with an increased size are the best out there. Lastly, R&R Aluminum connecting rods specifically designed for our heavy duty application.
Comes as a complete set of 4.