Join Date: Feb 2010
Location: Grenfell Saskatchewan Canada
Thanked 17 Times in 16 Posts
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actually the garret turbo on the 12.7L series 60 detroit diesels has the same sort of compressor with no silencer ring, but the air reasearch turbo on my 8630 has it built right into the compressor housing along with the shwitzer 3LD on my 4320 john deere. however the VGT turbo on the ISX cummins found in HD trucks DOES have a removable silencer ring in it from factory, and even when you buy a replacement it comes with a removable silencer ring, so im thinking cummins installed them from factory. i wouldnt want to remove one on them ISX engines though, they whistle like a bugger with the ring in lol. with it out it would probably sound like a jet taking off under the hood ever time you shifted a gear.
Brent1985 GMC (The Brown Streak) Sierra Classic 1500 4WD With 6.2L V8 Turbo Diesel Big Fuel System
1995 Dodge 2500 4x4 NV4500 12 Valve Cummins No Plate, Gauges, 5" Homemade Stacks.