Bosio DLC 520 1993-2003 VW TDI

Bosio DLC 520 1993-2003 VW TDI

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Part Number:DLC 520

Kerma TDI - Bosio DLC 520 1993-2003 VW TDI 

  • Application: 1993-2003 VW TDI VE Injection Pump
  • Stock replacement for European 110 hp AFN / ASV motors but with DLC Coatings
  • All of our Bosio VE nozzles ship with new OEM sealing washers included
  • Supports Power Outputs from: 90-160hp (Requires Additional Supporting Modifications) 
  • Flow Data: +61% over Stock Flow (vs the 90hp Bosch DSLA 150P 706 nozzle) 
  • Set of 4 Nozzles 


  • Optimized spray pattern
  • Closer tolerances
  • Hardened wear surfaces
  • DLC Coated needle for superior wear characteristics with ULSD fuel
  • More power than the OEM parts
  • More torque than OEM parts
  • Less exhaust smoke for the same power output
  • Improved economy 
  • Better Throttle Response
  • Cleaner Startups
ULSD Rated Nozzle

DLC (Diamond Like Carbon) coatings cover all of the internal needles sliding surfaces. The lower portion is not coated since this is a direct contact surface that requires a normal wear characteristic to generate the high pressure seal needed during pressure build up prior to and after injection.
DLC Coatings at the Nanometer level

The key advantage to a DLC coating is the superior sliding surface it creates between two moving parts. This allows significant reductions in friction, and far greater durabiltiy due to reduced reliance on the lubricity of the fuel.



Standard Needle and Nozzle

A standard needle is uncoated and relies on the end result of the precision machining. This leaves very slight imperfections in the surfaces that increase the reliance on the fuel to prevent wear. Also this slightly increases the friction and thus lowers the response time of the needle consequently lowering its overall efficiency.

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