M2 Motorsport 2.5″ Stainless Steel Exhaust Back Box For Mazda MX-5 NB

£322.80 inc. VAT

3 in stock|4 more due on 24/05/2024

M2 Motorsport 2.5″ Stainless Steel Exhaust Back Box For Mazda MX-5 NB is suitable for both naturally aspirated and forced induction applications. Most aftermarket systems are 2.25″ and the bump up to 2.5″ results in a 25% increase in volume. The increased diameter makes it ideal for use with turbos and superchargers as back pressure is reduced, helping the engine pump more air and make more power.

Manufactured from mandrel bent polished t304 stainless steel and tig-welded throughout, the M2 Motorsport back box features a 3.5″ tip, giving an aggressive look. The design of the back box ensures that volumes are suitable for long journeys, yet under full throttle sounds wonderfully sporty. An included dB killer means that decibel limits can be met even on the strictest of tracks.

Suitable for all 98-05 NB


  • 2.5″ bore
  • 3.5″ tip
  • T304 Stainless Steel
  • Fully tig welded
  • dB killer included

Additional information

Shipping Weight 9.4 kg
Shipping Dimensions 108 × 56 × 16 cm

M2 Motorsport


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 II (NB) 1998 - 2005