FREE shipping on USA orders over $300, excluding HI & AK
"EXTREME4" Filter Element Refill
Refill element for the "EXTREME4" Filter (formerly named "X4")
All filter refills come with new bolt and cap o-rings.
USA Shipping: Free shipping for Extreme oil filter kits or Extreme kits with accessories added to the same order. Free shipping no longer applicable for filter accessories or elements. We ship using USPS priority shipping (unless notified or requested otherwise), tracking # will be automatically sent.
International Shipping: International shipping cost is calculated during checkout, if you don't see your country as a shipping option please contact us.
Returns Policy GENERAL RETURN POLICY: Due to some abusing our past return policy we have laid out new rules: Please refer to the installation guide or general installation video before purchasing your kit, it's also best to confirm the pressure port and return port locations before purchasing a kit. We do not allow returns due to remorse or kits not matching your engine model. Insane Diesel will always work with you to find alternative solutions to installation any kit on different model engines, our goal is to get the kit installed no matter what, please refer to our guarantee.
DAMAGED PRODUCT RETURNS: All products are inspected before shipment and any damaged products must be photographed and reported within 4 business days from the delivery date. Only damaged products can be immediately replaced or returned for a refund. Damaged product returns must be wholly unused and they must arrive in original condition. A USPS pre-paid shipping label will be sent to return damaged products. We want to make sure you’re happy with our product so please contact us if you have any questions about your return at support@InsaneDiesel.com