Description
Upgrade your 2006–2011 Honda Civic Si with the XLR8 Aluminum Crank Pulley (PUL-K20Z3)—a lightweight, precision-engineered replacement pulley that reduces rotational mass to free up valuable horsepower. Crafted from high-quality aluminum, this pulley matches the stock diameter (11.5 oz) to maintain factory boost levels on supercharged engines, making it perfect for both stock and aftermarket setups.
By shedding over 3 pounds compared to the heavy stock crank pulley, the XLR8 pulley reduces parasitic losses, allowing your engine to deliver more power to the wheels. It’s also ideal for vehicles with high wattage aftermarket audio systems where maintaining factory voltage levels is critical during competition.
Manufactured in the U.S. with premium materials and CNC-machined to aerospace-grade tolerances (.001”), this pulley offers durability, reliability, and a flawless balance for smooth engine operation. Backed by the XLR8 full warranty, it’s a trusted upgrade that delivers both performance and peace of mind.
Key Features:
- Lightweight aluminum construction for significant weight reduction and horsepower gains
- Stock diameter design (11.5 oz) maintains factory boost levels for supercharged engines
- CNC machined with precision to within .001" tolerances for perfect fit and balance
- 0 gram balanced for vibration-free operation
- Manufactured in the USA with premium domestic materials
- Ideal for factory or aftermarket supercharger setups and high wattage audio systems
- Includes XLR8 full warranty for quality assurance
Weight Comparison:
- Stock Crank Pulley Weight: 4.1 lbs
- XLR8 Aluminum Pulley Weight: 0.8 lbs
Vehicle Fitment:
- Honda Civic Si (2006–2011)
- Engine Code: K20Z3
