Manley Piston Ring Set Ford Focus RS (LZ) / Mustang EcoBoost (FM / FN / FO)

$395.00
SKU: 46875-4
Bore Size
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Four Manley 87.5 mm piston ring sets stacked, one set per cylinder - Manley Thumbnail Manley piston ring sets laid out in four rows: top, second and oil rings - Manley Thumbnail Manley Premium Steel top, second and three-piece oil rings, four sets side by side - Manley Thumbnail Manley piston ring sets in two pairs of stacks, side view of ring widths - Manley Thumbnail Manley piston ring sets viewed edge-on, showing the oil ring rails and expander - Manley Thumbnail Manley 2.3L EcoBoost ring sets in two groups, low-angle view - Manley Thumbnail
Four Manley 87.5 mm piston ring sets stacked, one set per cylinder - Manley
Manley Piston Ring Set 87.50mm (STD)$395.00

Manley Piston Ring Set - Ford Focus RS (LZ) / Mustang EcoBoost (FM / FN / FO)

Manley piston ring sets for the 2.3L EcoBoost in the Ford Focus RS (LZ) and the Mustang EcoBoost (FM / FN, including the High Performance, and the 2024-on FO). Each set matches one of Manley's 2.3L EcoBoost Platinum Series piston sets (Standard and Extreme Duty), so you can re-ring an engine or keep a matched set on the shelf for the rebuild.

Every set has a Premium Steel top ring, a Napier-style second ring and a three-piece oil ring (1.2 mm / 1.2 mm / 2.8 mm). Steel top rings are Manley's pick for boosted and high-power engines. The rings are file fit, so the end gaps can be set to suit your boost and fuel.

Which ring set do I need?

Ring set Bore Suits Manley piston set
46875-4 87.50 mm (standard) 637000C-4 / 637000CE-4
46876-4 87.60 mm (+0.10 mm) 637001C-4 / 637001CE-4
46880-4 88.00 mm (+0.50 mm) 637005C-4 / 637005CE-4

Note: Manley's 2.3L EcoBoost piston sets already come with these rings; this listing is the ring set on its own. Choose the set that matches your piston part number and finished bore. The rings must be file fitted and gapped before installation. Installation by a professional engine builder is recommended.

Features

  • Premium Steel top ring for high-boost use
  • Napier-style second ring for oil control
  • Three-piece oil ring, 7-11 lb tension
  • 1.2 mm / 1.2 mm / 2.8 mm ring package to suit Manley 2.3L EcoBoost pistons
  • File fit, so end gaps can be set for your build
  • Set of 4: one engine

Pairs Well With

Shop more: Manley | Pistons | Rods, Cranks and Bearings

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