Much like many other factory parts in your engine, the crank pulley is a wear-item with a shelf-life. The rubber pieces in the factory damper can deteriorate over time, causing a failure that could result in pistons hitting the valves, and destroying your engine. Also, factory crank pulleys were designed to operate at a certain speed and maximum rpm. When racing an engine, we often rev it higher than it was designed to from the factory, pushing many of the factory parts past their design criteria closer to failure.
For this reason, many sanctioned race classes require an "SFI Approved" crank pulley/damper, and will not even allow factory crank pulleys through inspection.
ATI has designed a 5.5” damper -- Part # 918522 -- for the '94 - '05 Mazda Miata 2.0L engine for high horsepower street & race use. This new design is a direct replacement for the stock OEM damper. The heart of this unit is the tried and true “damper within a damper” design that has put ATI ahead of the rest. The outer shell is machined to utilize the factory serpentine belt set-up.
This part number includes the belt guide for the timing gear. This is to be used with the stock trigger wheel. If you are not using a trigger wheel, please purchase part number 918522NTW from us instead. Modifying stock trigger wheel is required to bolt up to the back of the ATI damper.
Specifications
More Information
Vendor Name Code Part Number
918522 & 916885BG
Barcode
800157028519
UPC Code
800157028519
Note
Street & Race, Yes A/C & P/S, use with stock trigger wheel
Note
This one is to be used with the stock trigger wheel. ATI Super Damper Crank Pulley BP 1.8L Miata 94-05 Mazda
Item Weight
6.2lbs
Shipping Weight (Dimensional)
8.800000
Clearance Sale
No
Availability
Call
Part Type
Crank Pulleys
Make
Mazda
Model
Miata 90-97 NA, Miata 98-05 NB
Engine
BP 1.8L
Color
Black
Brand
ATI Racing
Carb Legal
Unspecified
Shell Material
Aluminum
Pulley Outer Diameter
5.67"
Shipping Label
Free Shipping
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