Piston Set Genuine for Mazda MX-5 NA NB 1.8

Piston Set Genuine for Mazda MX-5 NA NB 1.8

Genuine set of standard replacement cast pistons for the Mazda MX-5 NA NB 1.8 from 1994-2005. Available in either 83mm, 83.25mm or 83.5mm sizes to suit your application. Each piston is supplied with a matching gudgeon pin and locking snap rings.

In this bundle, we’ve added the option for either genuine Mazda piston rings or Hastings aftermarket rings so you can select the ring set that is right for you. These pistons are an ideal upgrade for any 1.8 engine looking to increase the compression ratio to 10.0:1 using the 01-05 VVT pistons. A significant bump is on offer, with 1994-1997 1.8s being 9.0:1 and 1998-2000 1.8s coming in at 9.5:1


  • Genuine Mazda piston
  • Original cast construction
  • Original compression ratios of 9.0:1, 9.5:1 and 10.5:1
  • Available in standard, +0.25mm and +0.5mm sizes

Additional information




83mm, 83.25mm, 83.5mm


9.0:1, 9.5:1, 10.5:1




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

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