Check the listing for details. Pro-Tec Additive Combustion Chamber Cleaner Carbon X K1 + K2. Condition: New. Listed at 54.31 USD. The K1 component (cleaning foam) is a specially developed high-performance formulation that dissolves and removes all contamination caused by operation in the entire combustion chamber of an engine. The product removes carbon residues in the cylinder head area, in particular on the valves, on the piston crown, on the upper surface of the piston and in the area of the first piston ring. Also cleans the intake and exhaust valve seats (if open). Residues in the EGR valve, turbocharger and air intake system (from the intake manifold to the intake valves) are also reliably eliminated. Carbon X does not attack seals and is compatible with all engine components. The K2 component (neutralizer) causes a chemical reaction that liquefies the previously introduced cleaning foam (K1) and binds the di.