Hello everyone, new to posting on forums! I recently bought a 2004 Mini Cooper S and started looking into upgrades that could be done to the car and have been really interested in the 15% reduction on the pulley. When i went to look at the pulley on my car i noticed it didn't look stock and was hoping someone would know it its the stock puller or if it been upgraded. Also wondering, if it has been upgraded, would running stock spark plugs to anything to the ride quality or hurt the car by doing so? Thank you so much and hope everyone has a good one!

*couldn't get a good angle but hope this picture is enough

 

hi, well I can say it doesn't look like mine and mine is stock hope this helps it looks like aftermarket

 

I'm new to the forum, just got an 2006 R53 Checkmate...
From all I've seen … That is NOT a stock pulley.

Stock Pulley should have a NUT in the middle.
Not sayin its an M7, but it sure does look a lot alike...
Here's a link to the M7
https://www.m7tuning.com/m7-r53-16-s...hnology-pulley