I had the street racepak in my buggy for four years, sorry don't remember the model number. Didn't use their canbus but did use their senders (which looked identical to autometer senders) . Worked fine and as advertised, but I never really liked it. Like you, I was initially excited about all the features, lights, fan, warnings, headlight and turn signal indicators, etc. But my one issue was that the display only had (iirc) four configurations, and I could never see all the parameters I wanted to see at the same time without checking through the different screens. For instance, on the main one I watched it had mph/rpm/water temp/ oil pressure/ fuel level. But to see trans temp and volts, I had to cycle two screens... pain in the ass. But the biggest problem I had with it, at a glance in extreme situations, it was to much info in a glance; especially if you are on the wrong screen, lol. I decided I preferred individual gauges installed directly in my line of sight, the racepak I had center mass.
Yes it was hard to read with polarized glasses, and the backlight started going out. Seemed fine with water and dust, on my buggy anyway.
But I did take it out finally and replaced with glow shift maxx tow (dual gauges-analog and digital readout on same gauge) . As also installed dummy lights on water temp, oil pressure, and fan switches. Much happier with great lighting and less confusion.
The manche will probably get canbus analog gauges to tie into Mast computer.
(No longer have the buggy)
I still have the race pack and manual and a couple senders if someone wanted it, but the backlight only half works. I'm sure they would repair it. I'm not sure if I still have the crimps for the mass plug in to redo the plug to your liking though.
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