Get the Best Price for BBK 15550 Aluminum 8-Rib Underdrive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 Piece

BBK 15550 Aluminum 8-Rib Underdrive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 PieceBuy BBK 15550 Aluminum 8-Rib Underdrive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 Piece

BBK 15550 Aluminum 8-Rib Underdrive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 Piece Product Description:



  • 8-15 horsepower in under 30 minutes
  • Direct bolt on replacements
  • Aircraft quality aluminum alloy

Product Description

BBK Aluminum 8-Rib Under drive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 Piece is made from aircraft quality aluminum alloy. These BBK under drive front accessory pulley kits are one of the easiest ways to free up an average of 8-15 horsepower in under 30 minutes. These BBK pulley kits are designed as direct bolt on replacements for the current factory pulleys and retain full cooling and charging characteristics.

Customer Reviews

Most helpful customer reviews

0 of 1 people found the following review helpful.
5Excellent!
By Eva Delany
I have a 2003 F-150, Lariat, 5.4L V8, 2wdI did not install this myself because I don't like messing around with the crank pulley so got this installed in a shop for $193.80. With this modification and a few others my computer estimates my mpg to be around 27 in the city. I have even seen it jump up to 35. To me this seems very high so I would say maybe 20 mpg. This higher than the stock mpg so I am happy with these numbers.. Using my computer I see there is no difference in charging and cooling. Doing some research on bbk's website I found out that they actually decrease the size of the crank and increase the size of the alternator and water pump. In doing this the belt does not have to be replaced. I still need to take it on a trip and really test it out but as far as acceleration I would say that I am a very happy. If you have about $300 to buy and professionally install this underdrive pulley kit it is well worth it.

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Buy BBK 15550 Aluminum 8-Rib Underdrive Pulley Kit for Ford F-Series/Expedition 4.6L/5.4L - 3 Piece