Picked up a Cobb from Jeff and installed it along with new plugs I had gotten. I've got serious traction problems on Cobb S2+F Aggr now (Michelin PSS 275s in the rear) where I didn't with the JB4. Awesome price and fast delivery! I need an LSD now, thanks Jeff!
'09 E93 M3 6MT, H&R sports, 15/12.5 TMS spacers, VF540 kit on the way
'09 Z4 sDrive35i, Deep Sea Blue Metallic, DCT, Premium Pkg, Ivory Leather pkg