How to tell if my pulley is stock

[Diesel///M]

I bought my car and it was semi modded. Air filter, exhaust, xpipe. and some cosmetic mods as well. I currently have a napa belt on the car. The car just came out of warranty and only has 24k miles on it so I wouldn't assume BMW changed it and used a napa belt. I know AA pulley uses napa belt. My cousin has a m3 with a build date a month later then mine and his setup looks the exact same in the engine bay minus the napa belt.

Does anyone have any advice on how to tell if it's stock or not? I'm going forced induction and need to know whether or not I need to get oem pulleys.

Thanks in advance for any info.

[tom @ eas]

Originally Posted by Diesel///M

I bought my car and it was semi modded. Air filter, exhaust, xpipe. and some cosmetic mods as well. I currently have a napa belt on the car. The car just came out of warranty and only has 24k miles on it so I wouldn't assume BMW changed it and used a napa belt. I know AA pulley uses napa belt. My cousin has a m3 with a build date a month later then mine and his setup looks the exact same in the engine bay minus the napa belt.

Does anyone have any advice on how to tell if it's stock or not? I'm going forced induction and need to know whether or not I need to get oem pulleys.

Thanks in advance for any info.

Typically stock crank pulleys are still Silver in color, different from the rest of the pulley system.


2008-5/08 6SPD models (non DCT) belt routing pictured

Hope this helps.

[VCMpower]

FI will require a stock crank pulley. That's a great reference pic Tom.

[Diesel///M]

Thanks Tom that's awesome. Ill
Check it out I was looking from the top at the wrong damn pulley lol FML hahha thanks again
I have dct it should still be pretty close to this pic right?

Sometimes I love the forums!