Dualoy Pistons

2006-2010 Duramax 6.6L LBZ/LMM/LLY Dualoy Reduced Compression Height Piston & Ring Kit (7220DKT)

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Size: .25MM
  • About
  • Specs
  • Fits

Dualoy Diesel pistons are cast and machined in-house to maintain the highest level of quality and consistency. All Dualoy pistons feature a high strength top ring carrier to improve strength of the top land, and resistance to the extreme heat of diesel engines. Oil cooling galleries are cast into the pistons, as required depending on the specific application.

Sold As: Kit with Rings

Engine Manufacturer: GM

Engine Family: LLY Duramax

VIN Code: D, 2, 6

OE Cross Reference: 97374384-R, 97374385-L

Engine Displacement (Liters): 6.6

Engine Displacement (cubic inches): 403

Crown (cc): +40.4cc

Top Land: 0.394

Pin Type: Floating

Bore Diameter MM: 103

Pin Number: 7211D-PP

Compression Height MM: 49.53

Rod (in): 6.42

Pin Configuration: Offset

Bore Diameter IN: 4.055

Base Number: 7220D

Pin Diameter (mm): 34.5

Compression Height IN: 1.95

Oversized: Yes

Stroke (mm): 99

Alloy: 332

Ring Pack: 3.0K, 2.0mm, 3.0mm

Year To: 2010

Pin Diameter (in): 1.358

Model: C&K Series Truck

Stroke (in): 3.898

Oversizes: STD.50mm 1.0mm

Rod (mm): 163.068


Oversize: .50mm

Year From: 2006

Year Range: 2006-2010

GM Duramax

2006 - 2010

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PowerHouse Machining was founded with the vision of creating a one-stop-shop for all of your light duty engine needs. We pride ourselves on our industry-leading engine quality, dedication to customer service, and sincere passion for our trade.