Manley Performance 99.75mm Bore Piston Ring Set - Set of 4 | 2004+ Subaru WRX STi (46997DT-4)

Manley Performance
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2004+ Subaru WRX STi Premium Steel Piston Ring Set - Set of 4 by Manley Performance

Manley stocks conventional style piston ring sets and Premium Steel top ring versions. The conventional sets feature high performance ductile iron (with plasma moly in-lay) top rings, reverse twist cast iron taper face or Napier style second rings (where noted *) and 3 piece oil rings. The Premium Steel top ring sets are ideal for high horsepower and forced induction/nitrous applications. Manley also offers Total Seal® famed Gapless® top ring packages for many of our piston applications.


  • Premium Steel Material
  • Napier style second rings and tabbed oil rails
  • 99.75mm Bore
  • File Fit
  • 1.2mm x 1.2mm x 2.0mm Ring Widths
  • 9-13 lbs Oil Ring Tension


  • Superior sealing
  • Ideal for high horsepower and forced induction/nitrous applications

Please Note: The image provided is generic and may not be an accurate representation of the product you will receive.


  • 2004+ Subaru WRX STi

What's In The Box?

  • 4 - Ring set


  • Manley products, due to their intended use, are sold without warranty.

Customer Reviews

Based on 1 review
Manley Rings

Finally got back to a subaru build and the rings from Total Seal are complete and correct. It used to be a mixed bag... but the quality of the rings are much better now and double oil rings with tabs to keep them in place. Glad they fixed their issues.