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Discussion Starter #1 (Edited)
SOLD

$165 including shipping in continental US.

New in box, never installed SLP Performance underdrive pulley. This pulley provides 25% reduction in parasitic drag from rotating engine accessories. This pulley is SLP part number 100235 and fits 2005-2010 5.7 and 6.1 engines. Due to the change in diameter this pulley does require a different serpentine belt. I believe I have the belt as well (have to search my garage) but if the belt will be included in sale if I locate it. Best price I've found for this pulley online is $219 plus $10 shipping. You save $64.

I bought this to install on my 2010 Challenger SRT8 but never installed it prior to selling the car.

I can't comment on performance gains on this platform, but FWIW I had an underdrive pulley/harmonic balancer on my KenneBell supercharged '94 Mustang (5.0L) and I did notice a gain with the butt dyno... nothing earth shattering but definitely pulled harder throughout the entire RPM range. Also I ran that car up to 120K miles with the underdrive pulley and never experienced any issues, no noticeable affect on heating and/or cooling (yes, I ran the supercharged mustang through every crazy new england winter).

PM me please if interested.
 

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