Maruha +1mm Big Valves Set of 16 for Mazda MX-5 NA NB 1.8

£336.73 inc. VAT

2 in stock

Maruha’s +1mm oversize valve set for Mazda MX-5 NA NB 1.8 are an essential part of any high performance naturally aspirated head. The increased size of the valve allows more flow at higher RPMs, which is important to make the most of large cams and high RPMs. The +1mm valves are sized accordingly to use the standard valve seat, however, the valves and seats require machining to guarantee they seal properly together.

Through Maruha’s extensive testing, they have chosen to not use back-cut valve stems to ensure the stem is strong enough to withstand the forces generated at high RPMs. It is recommended that the valve guides are replaced at the same time as the valves to prevent excessive oil consumption and reduce noise in the valvetrain.

Sold as a set of 16

Additional information

Shipping Weight 0.85 kg
Shipping Dimensions 19.5 × 18.5 × 7 cm
Brand

Maruha

Engine

1.8

Model

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.