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The meziere pump for a BB is 7# The aluminum MP WP housing and pump with moroso motor is 14.5#

The stock WP housing and pump weighs 21# add pullys and 1.5# Moroso motor and your looking at 23 to 24#

So your looking at a 15# + minimum difference between a Meziere and a stock steel housing,pump and moroso motor. mike

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great info! Thanks!

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Your Welcome!, I weighed all 3 seperate pump setups on my bathroom scale minutes before I posted. The Meziere being my newest pump upgrade.

The insanity of getting the car lighter never stops. mike

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Not only lighter, in this case you will be faster!
I did the test on an engine dyno with a 615 hp 440. I went from stock wp with crank driven belt to a Moroso electric motor and belt= 19 hp on back to back pulls!
For once the mfg. was accurate on their claim. Don