2008 BMW M3 E90
Buckhead Imports tuned 2008 E90 M3
H&R moderate lowering springs .8 front .6 rear (below)
We removed the stock (silver) crankshaft pulley and installed a smaller (black) Buckhead Imports crankshaft pulley
We removed the stock cats (below left) and installed a custom Buckhead Imports race exhaust (below right)
Buckhead Imports installed an AFE filter kit (The scoops go in behind the kidney grills)
Buckhead Imports installed a custom tune and everything listed above and had some pretty impressive gains