I am in the middle of an s5 build reaching for 300whp on stand alone. I am having trouble deciding on a set of apex seals. Any suggestions?

 

Stock Mazda.

 

 

Stock Mazda seals all the way!! Especially since you are only after 300whp.

Zach

 

 

Agreed, stock 2 piece mazda seals. You can certainly have them cryo-treated as well for additional wear resistance. Might as well do all the side, corner seals and springs as well at the same time as they go by weight and those are so light you'll be under the min. weight. Just a thought but it does work well and since the motor is already apart...