RB26DETT pistons 

 Stock - 05U

•  86mm
• 1.5mm top ring 
• Oil cooling channels
• Available in overbore sizes
• Not forged
• When they break, they normally break the ring land between the top ring, and 2nd ring

N1 - 24U

• 86 mm 86.5 87mm
• 1.2 mm top ring
• 1.2 mm 2nd ring
• Not forged
• Thinner rings than 05U pistons 

Reinik

Tomei

CP

Ross

JE