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Precision Parts Compatible 2011 2016 PP 421 B Review

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Very good

Revainrating 4 out of 5  
Rating 
4.0
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Description of Precision Parts Compatible 2011 2016 PP 421 B

The Precision Parts 3.5" high flow intake elbow replaces the plastic intake elbow on your LML engine. Not only will the larger diameter of this high flow intake elbow increase airflow to your turbocharger, but it will also lower EGT's with the unrestricted design. The Precision Parts 3.5" high flow intake elbow has a heavy duty gloss black powder coat finish and is covered by a 1-year warranty. Gloss Black Powder Coated Finish. Full 3.5" Mandrel Bent Elbow. Increased Airflow. Lower EGTs. 1-Year Warranty. NOTE: Must be used with aftermarket cold side pipe for clearance. Fitment: 2011-2016 Chevy Silverado 2500HD/3500HD 6.6L LML Duramax Diesel. Fitment: 2011-2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax Diesel.

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Type of review

Revainrating 4 out of 5

This is an upgraded flow tube

This was in a 2016 lml. Before that I had a standard tube with resonator removal plate and PCV redirection. Now the online applications are as follows. Small power increase, louder turbo whine and lower EGT. As for the power gain, I haven't measured it on the dyno, so I can't say if it's increased. It's obviously going to sound a lot smoother, so there's probably going to be a bit more added, but it's not enough for anyone to really notice. Now for the turbo whistle, it sounds the same to me…

Pros
  • Air Intake
Cons
  • No mold required