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 out accessory system noise. The GrimmSpeed Lightweight Crank Pulley is a game - changer. It slashes the rotational mass of the system, enabling your engine to speed up and slow down the rotating parts much faster.
**Part #: 095022**
**Quick Specs**
- 75% Reduction in Rotating Mass: Weighs just 1.1lb compared to the 4.4lb OEM pulley.
- Machined 6061 T6 Aluminum: Ensures high - quality, precise construction.
- Hard Anodized Finish: Guarantees a durable and corrosion - resistant surface.
- Removal Tool Mounting: Allows the use of the GrimmSpeed Crank Pulley Tool.
- Factory Fitment: A direct replacement for easy installation.
**Design**
Our engineers designed this pulley to be a perfect factory replacement while maximizing performance. Many think that only the mass of a crank pulley matters, but it's actually the moment of inertia that affects engine and throttle response. A lower moment of inertia means less torque is needed to spin the pulley and the engine. Our team kept the minimal mass close to the pulley's center without sacrificing strength.
The result? A pulley that fits well, looks great, and performs as expected. Right from your first test drive, you'll experience smoother operation, quicker response, and a more enjoyable drive. Datalogs show that it quantitatively 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 you can easily install it in place of the old one. If you want to remove the old pulley, you can use the GrimmSpeed Crank Pulley Tool thanks to the removal tool mounting on this pulley.
When it comes to maintenance, since it has a hard anodized finish, it's quite resistant to corrosion. But it's still a good idea to check it regularly, especially after long drives or if you've been driving in harsh conditions. Look for any signs of wear or damage, like scratches or dents.
Here are some important things to note. Make sure your engine is off and cooled down before you start the installation process. And always follow the proper safety procedures when working on your vehicle. Also, keep in mind that this pulley is designed for specific vehicle models and engine types, so double - check the fitments to ensure it will work for your car.
