SPI Top End Engine Rebuild Kit 2004 Polaris 550 Pro X FanSM-09605K MSRP: $810.00 Sale price $530.69 SPI TOP END GASKET KIT SPI TOP END GASKET KIT SPI top end gasket sets contain high performance reed and base gaskets plus intake exhaust gaskets for a complete cylinder rebuild. Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $810.00 Sale price $530.69 Subtotal: Add to Cart