What's the advantage of Monarks vs. Bosch injectors? What causes the performance/efficiency boost?

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The quality of Bosch injectors,and nozzles went down since they moved to India.
Also Monarks are better,but better still to use alternate fuels

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Is there any info available to support this.
One of the sellers of Monark Nozzles; Nercedes Source is the only one I have read that makes that claim.

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84 300D, 82 Volvo 244Gl Diesel

The Monark Nozzles are a direct replacement for the Bosch one. I have not read of any claim of increased performance/efficiency for them.
On the 617.952 Engines the Bosch Nozzles for them (Germany if there is any left or Indian) have a design feature that I feel makes them more prone to getting clogged with Carbon.
Passages #14 and #15 get Plugged with Carbon. (All of the ones on my Car were so plugged and most of the ones I pulled from the junk were also plugged.)
Replacing the Plugged Nozzles reduced a significant amount of hot idle shaking.
The Monark Nozzles for the 617.952 do not use those passages but instead use a flat ground portion on the Pintel called a Facet. Bosch Nozzles for the later Diesel Engines also use that facet.

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84 300D, 82 Volvo 244Gl Diesel