I had a new Turbo installed... And made a discovery
04-30-2016, (Subject: I had a new Turbo installed... And made a discovery ) 
Post: #9
RE: I had a new Turbo installed... And made a discovery
561 is slightly smaller. Seen on nore mid level hp cpls. Usually the 551 is on 550-600 hp models. Every big hoid truck ive seen with a 550 and up has had the 551. Trucks with smalker charge air coolers i believe tend to use the 561 for same hp rating.
Just what ive seen. Dunno how much truth there is to it
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RE: I had a new Turbo installed... And made a discovery - Rig Wrench - 04-30-2016



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