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JE Forged Pistons For Mazda MX-5 NA NB 1.8 are are specifically engineered for extreme applications, up to and including professional competition. Utilising 2618 T6 high tensile forged aluminium, JE Pistons are designed to perform in the most demanding environments, including high boost and heavy nitrous builds.

The domes and dishes feature smooth flowing radii for excellent flame travel. By smoothing the flame front, combustion can occur evenly in the cylinder, helping to reduce hot spots and detonation. Ready to use out of the box, JE Pistons require no deburring or preparation.


  • 2618 T6 high tensile forged aluminum
  • 1.0 x 1.2 x 2.8mm ring widths
  • .787 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting and wire locks included
  • Rings included
  • Set of four pistons


Oversize Bore CD mm Dome CC’s Gram Comp Ratio Rod(mm) Stroke
0.5 83.5 30.6 -2 294 9.0:1 132.95 85
1 84 30.6 -2.7 301 9.0:1 132.95 85
1.5 84.5 30.6 -3.4 307 9.0:1 132.95 85

+0.5, +1.0, +1.5




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Make Model Year
Mazda MX-5 1994 - 2005