M50, M52, M54, S50us, S52 naturally aspirated pistons

NOTE:  This is a custom order product, expect a 2 month lead time though it can be 1-3 months depending on demand.  Winter and spring will have the longest lead times and shortest in the summer and fall.
 
If you want to add Ceramic Coating or Skirt Coating it is now a seperate option that you need to add to your cart from the bottom end menu.
 
Naturally aspirated pistons for a M50, M52, M54, S50us or S52.  Designed by Alien Engineering and manufactured by Wiseco.  This is my own proprietary piston design made for street, circuit racing or drift applications, and also nitrous, supercharged, and lower power turbo applications.  By default the valve reliefs will clear 280+ degree cams with full vanos travel, and can do even larger valve reliefs availible on request.  Its a very common issue that people are getting very expensive pistons that have stock sized valve relieifs that won't accomodate larger aftermarket cams so I design them to match your cams.
 
Another added feature that I can do for 87mm bore pistons when using a cutring gasket is to add a clearance groove around the top of the piston to prevent contact between the pistons and cutting rings if a ring shifts slightly during install.  
 
These by default will come with 1mm thick stainless steel top rings and .160" wall wrist pins, but other options availible on request such as gapless rings.