I'd be skeptical on really cheap stuff...
All that Venom crap that's out there is usually junk.
eBay is flooded with them.
The word finally got out that they are more headaches than it's worth.
The BEST ones are stock.
It is always better to get your originals cleaned.
The reason why you got all that cheap stuff out there is because they are not original NipponDenso units.
They are usually Siemens / Rochester / etc. brand.
They are usually fuel injectors with equivalent flow rates, but they are not even close to the quality of the ND's.
This is why brand new ND's from the Mazda dealer are over $300 EACH.
-Ted
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