I have glowshif guages my mp3 and rx7. I never had a problem with them. I bought them originally just to put in my mp3 for show cause they matched my 7 color interior lighting and were cheap. They sent me a boost guage by accident instead of an oil pressure and when i called they just shipped me a oild pressure guage free so i threw the boost guage in my rx7 just for the hell of it. After i installed them i ended up finding that They work great, boost guage in the rx7 sees 26psi of boost with no issues all day. I do have to say The Build quality isnt as high as other companies they do feel sorta cheap but they do work quite well with no issues. The sell a package on ebay with 3 gauges of your choice and a tripple pillar pod for 99$