Boundary Billet Oil Pump Gears for Mazda MX-5 NA NB

Keep your engine alive, even spinning to the moon


£204.99 £169.26 ex VAT

15 in stock

VAT will be deducted at checkout for orders outside the UK
16 users have this item in wishlist

Boundary Billet Oil Pump Gears for Mazda MX-5 NA NB

A must have upgrade for any MX5 looking to run either a higher rev limiter, or higher power. A good rule of thumb is anything over 300 horsepower you really should be looking at these gears. Shock loading causing by boost cut or RPM limit can shatter the OEM sintered oil pump gears causing complete engine failure.

Consider it pretty required insurance if you’ve just built a forged engine with new pistons, rods, bearings – you wouldnt want all that to be ruined by an oil pump failure.

The sintered gears inside of a stock oil pump assembly only rates to about 6KSI of stress before shattering. These gears provide a serious structural upgrade to 90Ksi steel, these are to suit the Long nose 1.6 engine (1991.5) up to the NB1 1.8 engine – they are not suitable for VVT (check our other listing for those)



Weight0.33 kg
Dimensions22 × 14 × 2 cm

Boundary Engineering


There are no reviews yet.

Be the first to review “Boundary Billet Oil Pump Gears for Mazda MX-5 NA NB”
You have to agree to the comment policy.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Make Model Year
Mazda MX-5 1989 - 2005