## Polini C4 Crankshaft Bearings with Seals, CPI / Keeway / Minarelli The Polini C4 crankshaft bearing set with Viton&Teflon seals guarantees top quality and performance for your CPI, Keeway, or Minarelli engine. The renowned Polini brand, known for its innovative tuning solutions, in collaboration with a leading seal manufacturer, has created a set that will meet the requirements of even the most demanding users. ### Highest Quality Bearings and Seals C4 clearance bearings provide optimal operation under increased load conditions, typical for tuned engines. The metal bearing cage ensures durability and long life. Viton&Teflon seals are a combination of two technologically advanced materials. Viton, used on the outside, is characterized by exceptional resistance to extreme temperatures and operating conditions. Teflon, used on the inside, minimizes friction, which translates into lower power losses and better engine performance. ### Ideal for Tuning The Polini C4 bearing set with Viton&Teflon seals is an essential element of every tuning project. The increased bearing strength and minimized friction thanks to Teflon seals allow for maximum power and performance. Investing in Polini quality is an investment in the long and trouble-free operation of your engine. ### Benefits: * High quality C4 bearings * Durable Viton&Teflon seals * Minimal friction and power loss * Ideal for tuning * Increased engine life * Compatible with CPI, Keeway, and Minarelli