EXT43(N) Combustion Chamber Cleaner

  • Combustion chamber clean directly
  • Removes varnish and carbon deposits
  • Compression repair
  • Restores lost power
  • A smoother idle and acceleration
  • Reduction of exhaust emissions
  • Combustion Chamber Cleaner (250ml)
  • Holland Engineering / Made in EU / Bologna Italy

* NOT available for aluminum engine block

* Not available for USA and Canada

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  • Dimensions
  • Instructions
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Packing Can
Packaging 24 cans/carton
N.W 0.3 kg/can
7.2 kg/can
G.W. 7.7 kg/carton
Size 19 x 5.3 x 5.3 cm/can
Size 33 x 22 x 20 cm/carton


Install 9-CIRCLE 9CL-40285 Combustion chamber clean kit into spark plug holes or injectors opening, and fill EXT43 and wait 20-40 mins depending on the engine condition. While engine is cranking, carbons from combustion chamber will spread out and gather into half transparent bottle 9-CIRCLE provides.

Service suggestion: Once a year or every 20,000 KM

NOTE: This is not a DIY chemical, this chemical should be applied by a professional or technician.

Please make sure you work in well ventilated area.

How it works?

The one-component cleaning system for petrol engines works targeted and precisely without the need for complex dismantling of the cylinder head. It eliminates all contamination in the cylinder head area, at the inlet and outlet valves, the piston crown and the piston top lands. The secret of this high efficacy is the combination of a highly effective chemical formula and a long and targeted exposure time while the engine is idling.