JE Forged Pistons For Mazda MX-5 NA NB 1.8


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

Additional information




83.5mm, 84mm, 84.5mm


Mk1 (89-98), Mk2 (98-05)

Warranty information

Warranties cover defects in materials and workmanship only. Warranty is for replacement of a similar product, repair of the original product or refund of the purchase value only and excludes all labour and incurred charges including towing, fitting, inconvenience, and purchases of other manufacturer's products. The warranty is good for the period stated in the additional info tab from the date of purchase. Mileage warranties are for road use only and proof of mileage is required. Products must be installed by an independent experienced professional mechanic and the suspected defect must be present at the outset. The warranty does not cover damage caused by incorrect installation, failure to comply with the maintenance requirements of the vehicle, processing or otherwise changing the product, ordinary wear and tear, or any other external influences. Warranties are invalid if the product is used for racing, rallying, drifting, track days or any other form of motorsport or competition. Please refer to the manufacturer's own warranty documentation for more information.

Making a warranty claim

Proof of purchase receipt showing the date of purchase, proof of mileage at installation, proof of current mileage and invoice of the work undertaken by an independent experienced professional mechanic must be supplied along with the returned products for a warranty claim to be considered. If your vehicle needs to be used whilst your warranty claim is considered replacement parts from the same manufacturer should be purchased through BOFI Racing. In the event of a successful warranty claim, we will refund the card that was originally used to purchase the replacement parts, in full or in part depending on the nature of the claim. BOFI Racing reserves the right to make full or partial compensation at its sole discretion depending on the condition and mileage use of the returned suspect parts. For example, if you have used the part for several thousand miles before a defect is noticed, only partial compensation may be offered.

Make Model Year
Mazda MX-5 I (NA) 1993 - 1998
Mazda MX-5 II (NB) 1998 - 2005