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OBS - V.G.T. Holset turbo install
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[QUOTE="NorcalOBS, post: 990223, member: 14612"] Yes, from what I understand the 451 framed turbos came on higher HP rated cummins ISMs, ISLs, QSMs, M11s, lower hp rated ISX motors, as well as Volvo d12s and mack MP8s. The 551 frame turbos are the most common on the bigger 13 & 15 liter commercial engines like the ISX, MP8, etc. That is what made finding this turbo a tough hunt. The 451 frame turbos with the larger compressor are relatively rare. I have been beating up the web for a while now trying to find one of these for a good price and now the UPS man brings me this thing and I am not even sure what it is with that big compressor wheel on it. I don't think there is any way possible that this is a 551 model because the 551s usually are tremendously bigger in every way especially the exhaust side. However, I have never heard of a 451 with a compressor bigger than 64mm. I thought that is was either a 60mm or a 64mm on the 451s. The only holsets I know have a compressor this size are the HX52 an 55s. In actuality its a good thing I suppose, I am just wondering whats going on... Anyways, I'll try and get some pics of the internals up later today. Maybe, someone on here can set me strait again, lol. [/QUOTE]
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