I have the STRi X-Line water/oil temp, boost, fuel/oil pressure. Smoke lens amber lighting.
They work well.
But I wouldn't say they are better quality. For instance no connector between the gauge and the sensors: You have to twist and protect the wires. Also no ground: you have to ground them yourself with additional piece of wire. So not so clean in the engine bay.
But at the time I purchased 2 years ago they were the best for the price, no discussion.
That's for the cheap X-Line.
The DSD line is much more high range (equivalent to defi I've been told), but double price than prosport (at least here in Europe), but also twice less than defi!
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