Taffy's going to buy a VAC head for his M5 , should he go for stage 2 or stage 3 for a weekend driver and track day car ?Should I buy a stage 2 or stage 3 head ?
Mine will be a weekend driver ... with 3 to 4 trackdays per year.
VAC - BMW S38 Stage 2 Performance Cylinder Head
VAC - BMW S38 Stage 3 Performance Cylinder Head
Has anyone actually used one ?