Your factory crank pulley transfers energy from the crankshaft to the water pump, a/c compressor, and alternator via a rubber belt. However, it's quite heavy due to cost - effective manufacturing and using its mass to smooth accessory system noise (not a harmonic dampener). The GrimmSpeed Lightweight Crank Pulley slashes the system's rotational mass, enabling your engine to speed up and slow down the rotating parts much faster.
Part #: 095023
Quick Specs:
- 75% reduction in rotating mass (1.1lb compared to the 4.4lb OEM pulley).
- Machined from 6061 T6 Aluminum for high - quality, precise construction.
- Hard anodized finish for durability and corrosion resistance.
- Designed for the GrimmSpeed Crank Pulley Tool for easy removal.
- Factory fitment, a direct replacement for hassle - free installation.
Design:
Our engineers focused on creating a perfect factory replacement that maximizes performance. It's not just the mass of the crank pulley that matters; it's the moment of inertia. A lower moment of inertia means less torque is needed to spin the pulley and the engine. Our pulley keeps the minimal mass close to the center without sacrificing strength. The result? A well - fitting, good - looking pulley that works as expected. From your first drive, you'll enjoy smoother operation, faster response, and a more fun driving experience. Datalogs show it significantly improves throttle response compared to the OEM pulley.
Fitments:
- 2013+ Subaru BRZ
- 2015+ Subaru WRX
- 2012+ Subaru Impreza (FB/FA Engines Only)
- 2011+ Subaru Forester (FB/FA Engines Only)
- 2012+ Subaru Legacy (FB/FA Engines Only)
- 2012+ Subaru XV Crosstrek (FB/FA Engines Only)
- 2013+ Scion FR - S
Using the GrimmSpeed Lightweight Crank Pulley is straightforward. It's a direct replacement for your factory pulley, so installation is easy. Just make sure to use the GrimmSpeed Crank Pulley Tool for removal. When you start your car with the new pulley, you'll notice an immediate difference in how the engine responds.
As for maintenance, since it has a hard anodized finish, it's quite durable and resistant to corrosion. But it's still a good idea to check it regularly, especially if you drive in harsh conditions. Look for any signs of wear or damage, like cracks or chips. If you notice anything unusual, it might be time to replace the pulley.
Remember, this pulley is designed for specific models and engines, so always double - check that it fits your vehicle before installation. And if you're not sure about the installation process, it's best to have a professional do it for you.
