DJ Rock PR974.20 Engine Piston Ring Set
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DJ Rock

DJ Rock PR974.20 Engine Piston Ring Set

Brand DJ Rock PR974.20
Grade Type Premium
Bore Diameter 94
Fits Lexus and Toyota · 26 vehicles

OEM-quality standards. Manufactured to meet or exceed original equipment expectations.

Precision-engineered seal. Helps maintain compression and control oil consumption.

Premium materials. Cast iron or steel alloys add strength and wear resistance.

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Premium piston ring set for Toyota and Lexus engines

DJ Rock PR974.20 is a premium engine piston ring set built for a precise seal between the piston and cylinder wall. With a 94 mm bore diameter, it is made for complete engine service on select Toyota and Lexus V8 applications, including the 2005-2009 Toyota 4Runner, Sequoia, and Tundra, plus the 2005-2009 Lexus GX470 and 2005-2007 Lexus LX470 and Toyota Land Cruiser.

Key features

  • Premium-grade piston ring set for internal engine service
  • 94 mm bore diameter
  • Includes the ring set needed to service every piston in the engine
  • Built from cast iron or steel alloy materials for strength and wear resistance
  • Surface treatments help reduce friction and improve sealing performance
  • Supports compression retention, oil control, and heat transfer
  • Part number: PR974.20

Detailed product overview

The PR974.20 piston ring set is engineered for engines that need consistent cylinder sealing across all cylinders. It uses a typical ring layout with top compression rings, second wiper rings, and oil control rings to help maintain compression, regulate oil consumption, and manage heat transfer during operation. This set is manufactured to meet or exceed OEM quality standards and is suited for rebuild work where accurate bore fit and stable ring performance matter. PR974.20 is a direct service part for Toyota 4Runner, Toyota Sequoia, Toyota Tundra, Lexus GX470, Lexus LX470, and Toyota Land Cruiser applications listed below.

What this part helps address

  • Low compression caused by worn piston rings
  • Excessive oil consumption from ring wear or loss of tension
  • Blow-by from poor cylinder sealing
  • Uneven cylinder performance during engine rebuilds
  • Heat transfer issues related to worn ring packs

Installation notes and tips

Confirm the 94 mm bore diameter before installation and verify the engine code, cylinder bore condition, and ring end gap specifications during assembly. This set services the complete engine on the listed applications, and proper cleaning, inspection, and measurement are critical for a successful rebuild. Fits 2005-2009 Lexus GX470, N/A. Fits 2005-2007 Lexus LX470, N/A. Fits 2005-2009 Toyota 4Runner, N/A. Fits 2005-2009 Toyota Sequoia, N/A. Fits 2005-2009 Toyota Tundra, N/A. Fits 2005-2007 Toyota Land Cruiser, N/A.

Quality assurance

DJ Rock sources this piston ring set as a premium engine component built to OEM-quality expectations for durability, sealing consistency, and long service life in rebuild applications.

Related reading

This part fits 26 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2009LexusGX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2009Toyota4Runner4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2009ToyotaSequoia4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2009ToyotaTundra4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2008LexusGX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2008Toyota4Runner4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2008ToyotaSequoia4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2008ToyotaTundra4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007LexusGX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007LexusLX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007Toyota4Runner4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007ToyotaLand Cruiser4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007ToyotaSequoia4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2007ToyotaTundra4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006LexusGX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006LexusLX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006Toyota4Runner4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006ToyotaLand Cruiser4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006ToyotaSequoia4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2006ToyotaTundra4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005LexusGX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005LexusLX4704.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005Toyota4Runner4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005ToyotaLand Cruiser4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005ToyotaSequoia4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)
2005ToyotaTundra4.7LV8Set Services Complete Engine; 1.5x1.5x3.0; 1.2x1.2x3.0; .020" (.50mm)