Mazdaspeed Shim Under Bucket Followers for Mazda MX-5 NA NB

£20.36 inc. VAT

2 in stock

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Genuine MazdaSpeed shim under bucket followers allow the fitment of a huge range of aftermarket camshaft sizes and act as a replacement for both the NAs Hydraulic lifters and the NBs solid lifters. The standard “shim over bucket” design has a tendency to pop out shims when using big cams or are running at high RPMs due to the cam lobe hitting one side of the disc and allowing the other side to pop up. The chance of shims popping up enough to fly out increases with high RPMs or when using larger cams. By using a shim under bucket design the cam lobe comes into contact with the bucket itself, while the shim to space the bucket properly is inside the bucket, eliminating the shim popping. Take a look at the diagram below to see shim poping in action.

After a fresh valve job, we recommend assembling the valvetrain and use stacked feeler gauges to measure the lash (the distance between the top of the lifter and lobe of her cam) of each lifter. We recommend using Supertech lash caps with these lifters, these can be found below.

Supertech Lash Caps for Mazdaspeed Followers
£8.50
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Technical Specifications

HEIGHT	26.88mm / 1.0582″
INNER DIAMETER	27.99mm / 1.102″
OUTER DIAMETER	29.96mm / 1.1795″
STEM DIAMETER	5.98mm / .2355″
STEM TIP DIAMETER	5.54mm / .218″ NOTE: THERE IS A STEP-DOWN FROM THE DIAMETER OF THE STEM TO THE BOTTOM 3.58mm OF THE TIP
STEM TIP TO HEAD SURFACE	15.553mm / .61225″

Sold individually, 16 needed for a full head

Additional information

Shipping Weight	0.035 kg
Shipping Dimensions	12 × 9 × 4 cm
Brand	Mazdaspeed
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.