Cat Cams Tarmac Rally 285/277 12.50mm/12.00mm Camshafts for Mazda MX-5 NA NB 94-00 1.8

£754.80 inc. VAT

Available to order — usually ships in under 3 weeks

Cat Cams Tarmac Rally 285/277 Camshafts for Mazda MX-5 1.8 BP for race and rally engines. These Camshafts are for use in 1840cc BP and BP4W engines. Will not work with standard hydraulic followers. Upgraded shim under bucket cam followers must be used.

FOR COMPETITION APPLICATIONS ONLY. Following details must be verified:
  • Camshafts must turn smooth in the cylinder head, provide free travel by machining where needed
  • Distance between valve seal and retainer at full lift must be 0.6mm at least
  • Minimum valve spring travel of 1.0mm at full lift must be provided
  • Distance between the valve and piston 1.0mm (pref. 1.5mm). check 5-15? before TDC on the exhaust and after TDC on the intake
  • Only for use in competition engines?with adjustable engine management

Camshaft Data Intake Exhaust
Lash ramp 0.25mm 0.25mm
Duration @ 0.1mm 285? 277?
Duration @ 1.0mm 251? 243?
Valve lift 12.50mm 12.00mm
Lobe angle 106 106
Timing @ 1.0mm 20? / 51? 48? / 15?
Valve lift @ TDC 3.70mm 3.15mm


Parts Required
Cam Wheels Y
Followers Y
Valve Lash Y
Valve Spring Y


Additional information

Shipping Weight 6 kg
Shipping Dimensions 57 × 28 × 10 cm

Cat Cams



Cam Followers

Upgraded Shim Under Bucket


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.

Make Model Year
Mazda MX-5 I (NA) 1993 - 1998
Mazda MX-5 II (NB) 1998 - 2000