Had a mechanical boost gauge installed on my A500 as the factory one is electronic and abit out of eye line when driving.
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Simple T-piece Plumed it in, hardest thing was running the vacuum line into the cabin, guy who fitted it ran it under the front wing and seems to work really well.
I went for a Japanese branded item which cost abit more but more generic mechanical boost gauges can be picked up for about £50 or so
