The STM-Spec Manley Evo IV-IX Custom 11.5:1 Pistons for 2.0L 4G63 are now available! These are the same gas ported pistons we have been testing in our STM Race Engines and easily trapping 165+ MPH in the 1/4! The STM-Spec Pistons are only available in 85.5mm bore and come with coated skirts, rings and wrist pins.
If you have questions about your build, feel free to give us a call and we will get you on the right path to your goals. STM-Spec Pistons are capable of handling all the power you can throw at them.
Extreme Duty 22mm
- Gas ported
- Moly coated skirts
- 2618 high strength material
- Lightweight design with offset wrist pin for quiet start-ups
- 9310 Alloy .210" Extreme Duty Wall wrist pin
- Pressure balance groove
- Premium Steel top rings with Napier seconds and round wire locks included
Set of 4 Pistons
Round Wire Locks
Piston Rings 85.5 Bore (46855-4)
Extreme Duty 9310 Alloy Upgraded Wrist Pins