S4
Stage 3
O.CT Stage 3
matches the Milltek turbo-back exhaust with custom tuning. 391 lb-ft of
torque that just keeps pulling. |
S4
Stage 4
Monsterous
torque of nearly 400 lb-ft that is as long and flat as the OEM torque
curve. |
S4
Stage 5 & 6
Even more
power than Stage 4? Yes it's true. Watch this space later this month. |