This product review will go over the quality, installation, fitment, and function of the Perrin crank pulley.
The Perrin crank pulley improves performance and increases throttle response while also saving weight. It is a replacement for the heavy stock pulley that comes on the Subaru BRZ, Scion FRS, or Toyota 86. The stock pulley weighs nearly 5lbs and the Perrin alternative is almost 4lbs lighter! Changing out the crank pulley to a lightweight alternative like the Perrin, is a cost effective upgrade.
The Perrin crank pulley is a precision machined piece of lightweight aluminum. Balanced with holes around the inner section, the pulley maximizes weight savings while being very strong and durable. The Perrin crank pulley comes finished in an anodized red or black. As with most Perrin products, this crank pulley feels and looks like a quality piece of equipment.
While the changing out a pulley is not a difficult task, it does take some strength to remove the OEM pulley. It also helps to be familiar with how the accessory belts route through the various components, as you must remove it to install the pulley. Perrin includes detailed instructions that start with removing the accessory belt. Once the belt is removed, the car must be on the ground and placed into 6th gear. Now comes the hard part of removing the stock crank bolt. Using a 22mm socket and breaker bar (and probably an extender) you will have to muscle the crank bolt loose. Turn the breaker bar counter clockwise to loosen the crank bolt and be careful not to slip, as you could potentially hit a radiator hose or some other part of the car.
Once it is loose, you can remove it completely, making sure the retaining pin on the back of the pulley stays in place. Installing the Perrin crank pulley is just the opposite of taking it off. The Perrin instructions do call for some oil on the crank bolt face as well as the threads before re-installing it. When tightening down the crank bolt, there is a specific process to follow as detailed in the Perrin instructions. Take care during this process as you want to make sure it is done correctly. Once the crank bolt is torqued down, you simply re-install the accessory belt and the process is complete.
The Perrin crank pulley fits just like the OEM product. The precision machined pulley has no issues lining up on the crank or crank alignment pin. The grooves for the accessory belt are also as good as it gets for a product like this. Not only does the Perrin crank pulley fit perfect, it looks great as well!
The Perrin crank pulley does was it was designed to do. Immediately one will notice an increase in throttle response, or more crisp feeling in the accelerator pedal after installing the crank pulley. In addition, the car seems a tiny bit less restricted when revving through the gears. While these gains are small, they are noticeable and should complement other upgrades that have been, or may be done to your car.
I am giving the Perrin crank pulley a 4 star rating. It loses a star simply because it can be difficult to remove the OEM crank pulley bolt. Otherwise, it is a great bang for your buck upgrade with positive performance improvements.
Perrin crank pulley rating : 4 out of 5 stars
For roughly $110.00, you can purchase a Perrin crank pulley for your 2013+ Subaru BRZ, Scion FRS, or Toyota 86 at the link below.