Kaaz 2 Way Limited Slip Differential for Mazda MX-5 NA 1.8 & All NB

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Kaaz 2 Way Limited Slip Differential for Mazda MX-5 NA 1.8 & All NB

Kaaz Limited Slip Differentials are renowned in the motorsport community for being rugged, reliable and ready to go out of the box. This diff can be supplied as standard, or as an updated SuperQ unit. The SuperQ range feature treated low friction plates which benefit from quieter and smoother performance. As well as this, SuperQ units benefit from a longer plate life span, increased heat dissipation and don’t have a break-in period.

Plate Type Diffs

Plate type Limited Slip Differentials (LSD) use plate packs (sometimes called clutch packs) to effectively lock the entire rear axle under load.

It does this by using a cross pin and a ramp ring. The cross pin is a long cylindrical pin that sits in the middle of the diff between either one or two ramp rings.

These ramp rings have literal ramps machined into the side, when under load the whole ramp ring rotates causing the ramps to ride up against the cross pin, forcing the rings apart. As these ramp rings are forced apart, they push several friction plates together on either side of the diff.

This essentially acts like a clutch, but instead of applying the clutch to a moving shaft, it applies it to a stationary plate until there is enough friction between the plates to momentarily lock the diff.

What does 2 way mean?

LSDs come in 3 different “ways”, 1-way, 1.5-way and 2-way. This has to do with if the diff locks under acceleration, deceleration or both.

A 2-way diff is capable of locking under both acceleration and deceleration. It does this by having exactly the same ramp angles for both acceleration and deceleration.

1-way diffs are only capable of locking under acceleration. This is the “kindest” type of LSD and is normally only used for fast road driving.

A 1.5-way diff aims to find a middle ground between the two by making it easier to lock the diff under acceleration and harder under deceleration. This is done by having a lower ramp angle (this is the angle of the ramp that is machined into the ramp ring) for the acceleration side than the deceleration side.

Preload

Pre-load is the amount of pressure that is already applied onto the friction plates before the ramp rings push them together. The more pre-load you have, the more pressure will be exerted onto the friction plates. This means you’ll need less torque from the engine to lock the diff.

Ramp angles

Ramp angles are literally the angle of the ramp that is machined into the ramp rings. Depending on the angle of the ramp, it will be easier or harder for the ramps rings to ride up the cross pin and lock the diff.

Kit Contents

Kaaz Diff
Kaaz Oil

Additional information

Shipping Weight	10.130 kg
Shipping Dimensions	32 × 25 × 25 cm
Brand	Kaaz
Type	Standard, SuperQ
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.