Stage 1.25 300HP Forged Engine Package for Mazda MX-5 NA NB

Original price was: £600.79.Current price is: £515.81. inc. VAT

Stage 1.25 300HP Forged Engine Package for Mazda MX-5 NA NB

This stage 1.25 forged engine package contains the bare essentials you need to install forged connecting rods in your B6 or BP. Whether you have a 1989 1.6 or a 2005 1.8, we’ve compiled all the parts within this kit that will support up to 280HP. We’ve stripped out any parts that aren’t absolutely necessary to strip the kit back to the minimum parts you can get away with installing.

To get the kit down to its bare components, you will need to leave the crank in place. Doing so means main bearings, thrust washers and piston rings can be omitted. Piston rings will need to be reused, so it is extremely important they are kept in order when the pistons are removed from the engine and installed back into the bore from which they came. We strongly recommend gapping the piston rings at the same time to prevent ringland failure further down the line.

These refreshed kits contain the gaskets required for a bare-bones engine block build. The Stage 1.25 package uses genuine head gaskets and sump seals for all model years. The 1.8s use an MLS head gasket, whilst the 1.6 uses a composite head gasket. We’ve included a genuine oil pick-up gasket and new cylinder head locating dowels too to complete the kit.

Recommended Ring Gap
 Top 19 thou
 Bottom 21 thou

Please note this kit is not suitable for Mazda MX-5 NB 98-05 1.6s because they use press fit gudgeon pins, meaning the pistons cannot be reused

Stage guide

  • Stage 1 – Aftermarket gaskets
  • Stage 1.25 – Genuine gaskets
  • Stage 1.5 – Genuine & Cometic gaskets

Kit Includes

  • MaxPeedingRods connecting rods
  • ACL Race connecting rod bearings – standard size
  • Genuine Mazda head gasket
  • Genuine Mazda sump gaskets
  • Genuine Mazda oil pickup gasket
  • Genuine Mazda cylinder head locating dowels

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.