Caterpiller C11 11.1L Bypass Oil Filtration Kit

Regular price $1,389.99

Caterpillar C11 11.1L Bypass Oil Filtration Kit

  • 1 "Extreme4" Filter housing (HX4XLH)
  • 1 "Extreme4" filter element (EX4XLE)
  • 2 In/out housing fittings (EM11X, AN06-06FJ)
  • 1 Pressure port fitting (T1220, AN06-08MP, AN06-06FJ)
  • 1 Return port fitting (S11812, AN06-06FJ90) Verify pan plug is 1 1/8-12NPT
  • 1 Mounting bracket and bracket hardware (ZBrckX4)
  • 12ft of hose to be cut to your preference.

Optional accessories: 

  • Oil sample pump $165 (contact us to add to your order)
  • Exteme4 filter element 
  • Crimped hose can be ordered separately (contact us to add to your order)

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 Free shipping no longer applicable for filter accessories or elements.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
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
Caterpiller C11 11.1L Bypass Oil Filtration Kit
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Caterpiller C11 11.1L Bypass Oil Filtration Kit
Caterpiller C11 11.1L Bypass Oil Filtration Kit


Providing the best protection against engine wear, oil degradation, acidity, rust, and corrosion.