Exotic-metal55

We have a limited number of kits in stock and running a make a fair offer deal. So PM a fair offer on a kit and lets make a deal. Real easy install.

http://ultimatepd.com/2011-2014-m271...nk-pulley.html

Knightmare69

To clarify, these are both smaller and lighter than stock or just lighter but same size? Also, it's lighter but how does it weather against the vibrations of the engine long term? I'm interested but given the already high compression of the engine and what I've read to be at the edge tolerances of the engine from the factory, I'm looking at the long term drivability.

Exotic-metal55

The pulley kit is lighter and and smaller in diameter. No tune needed and this 30 year old concept on combustion engines to reduce rotational mass, free up horsepower from less drag and reduce accessory wear is used by many that understand the concept. This has been a clean way to free up power and reduce accessory wear. I have run under drive crank pulleys on my vehicles and many for over 170K miles and by reducing accessory rpm, idlers speed and engine load, have found that those wear items last much longer. I run underdrive pulleys on every vehicle I own, from Mercedes, Audi sports cars/sedans and GM and Ford tow vehicles/ SUV.