These camshafts are a great upgrade for your street driven Toyota or Lexus powered by a 2JZ VVTi GE or GTE. The idle quality is unchanged and pretty much same the smoothness as the factory camshafts. The stock cams start to fall off after 5000rpm. These cams will retain the same torque curve as the factory cams, but the power continues onto around 7000rpm before falling off. This camshaft set is great for daily street use without the top end falling off. We generally recommend these camshafts for a power range of 500-900hp. Go to the next step up in duration if you need more power.