Subaru EJ25 DOHC Pistons

CP-Carillo is a well-known brand in racing circles and among engine builders. This is a brand that has been around since 1963 and has since made an incredible journey. Over the years, the company has produced an incredibly wide range of forged pistons, connecting rods, stroker kits, piston rings, piston bolts, etc.

CP Pistons has built a reputation for manufacturing the best pistons in the sport compact market. They are recognized as technological leaders and developers in motorsport. Their focus is to deliver the best pistons and at the same time have the best customer support!

What should you consider when buying pistons?

The thing to think about is what kind of engine to build. Should it be a turbo engine or a naturally aspirated engine? Should it run on ethanol or gasoline? Do I want a motor with wide power range or peak power? There are many factors that come into play when choosing pistons. Once you have decided, you can assume that a engine with forced induction should have a set of pistons with slightly lower compression than an engine without a turbo/supercharger. The reason for that is that if you were to push the fuel/air mixture into a cylinder where the compression is too high, the engine will stall. It will ultimately lead to a broken motor. On the other hand, if you run on ethanol, you can have a slightly higher comp. without it spiking as ethanol is more resistant to knocking (higher octane number).

As said, there is a lot to think about, but if you have the slightest doubt, don't hesitate to contact us and we will help!