Pulley Kits

Select your vehicle to see Pulley Kits that fit

Pulley Kits: less parasitic drag from your accessory drive

A crank pulley, and the matching alternator and other accessory pulleys, turn your belt-driven components off the engine. The pulley kits here are underdrive kits: the pulleys are cut to different diameters than stock so the accessories spin a little slower, pulling less power off the crank to run them. That frees up a bit of rotational effort, and the lightweight billet aluminum pieces in these kits weigh less than a cast factory pulley, so there is less mass for the engine to accelerate. It is a straightforward bolt-on job for anyone comfortable working around the front of the engine and the belt.

What ThreePiece stocks in pulley kits

This category is small and specific. There are 3 pulley kits in stock from 2 brands, BBK and Torque Solution. Current prices run from $242 to $299, which is the live range on what is here now rather than a fixed price. Two of the three kits list Ford fitment, covering the Ford Mustang, Ford Expedition and Ford F150 across roughly the 1996 to 2004 model years. The third is a Torque Solution crank pulley kit for the Porsche Boxster, Cayman, 996 and 997 with AC, excluding turbo engines.

BBK offers a 96-01 Mustang 4.6 GT/Cobra underdrive pulley kit and a 97-04 F150/Expedition 4.6/5.4 kit, both CNC billet aluminum three-piece sets. For the flat-six crowd there is the Torque Solution underdrive crank pulley kit.

How to choose

The first filter is your engine, because these are engine-specific. If you run a 4.6 or 5.4 Ford, the BBK three-piece kits give you crank, alternator and other accessory pulleys together. If you have a naturally aspirated Porsche listed above, the Torque Solution kit is a single crank pulley kit and comes in at the low end of the range. Note the Torque Solution part excludes turbo engines, so confirm your engine before ordering. Price spread across the three kits is narrow, so the decision is fitment first, then how much of the accessory drive you want to change at once.

What else you may need

Slower accessory speeds can affect belt routing and tension, so check your belt and idler hardware. Look at Bearings and Fittings if you are into the front of the engine anyway, and see Gasket Kits or Head Gaskets if the work is part of a larger build. Related engine work often touches Pistons, Fuel Pumps and Radiators. Browse everything in the Engine Components section for the full range.

Fitment help and ordering

Match the kit to your exact year, make and engine before you buy. If you are unsure, call fitment help at 813-535-5801 or use our contact page. Every order ships with free shipping, and Affirm financing is available at checkout.

Pulley Kits: less parasitic drag from your accessory drive

A crank pulley, and the matching alternator and other accessory pulleys, turn your belt-driven components off the engine. The pulley kits here are underdrive kits: the pulleys are cut to different diameters than stock so the accessories spin a little slower, pulling less power off the crank to run them. That frees up a bit of rotational effort, and the lightweight billet aluminum pieces in these kits weigh less than a cast factory pulley, so there is less mass for the engine to accelerate. It is a straightforward bolt-on job for anyone comfortable working around the front of the engine and the belt.

What ThreePiece stocks in pulley kits

This category is small and specific. There are 3 pulley kits in stock from 2 brands, BBK and Torque Solution. Current prices run from $242 to $299, which is the live range on what is here now rather than a fixed price. Two of the three kits list Ford fitment, covering the Ford Mustang, Ford Expedition and Ford F150 across roughly the 1996 to 2004 model years. The third is a Torque Solution crank pulley kit for the Porsche Boxster, Cayman, 996 and 997 with AC, excluding turbo engines.

BBK offers a 96-01 Mustang 4.6 GT/Cobra underdrive pulley kit and a 97-04 F150/Expedition 4.6/5.4 kit, both CNC billet aluminum three-piece sets. For the flat-six crowd there is the Torque Solution underdrive crank pulley kit.

How to choose

The first filter is your engine, because these are engine-specific. If you run a 4.6 or 5.4 Ford, the BBK three-piece kits give you crank, alternator and other accessory pulleys together. If you have a naturally aspirated Porsche listed above, the Torque Solution kit is a single crank pulley kit and comes in at the low end of the range. Note the Torque Solution part excludes turbo engines, so confirm your engine before ordering. Price spread across the three kits is narrow, so the decision is fitment first, then how much of the accessory drive you want to change at once.

What else you may need

Slower accessory speeds can affect belt routing and tension, so check your belt and idler hardware. Look at Bearings and Fittings if you are into the front of the engine anyway, and see Gasket Kits or Head Gaskets if the work is part of a larger build. Related engine work often touches Pistons, Fuel Pumps and Radiators. Browse everything in the Engine Components section for the full range.

Fitment help and ordering

Match the kit to your exact year, make and engine before you buy. If you are unsure, call fitment help at 813-535-5801 or use our contact page. Every order ships with free shipping, and Affirm financing is available at checkout.