While simple in principle, the S-Flo for the 2.7l twin turbo produces quite tangible increases in engine power and smoothness. The resulting improvements are from a combination of air filter design and the precise mandrel bent transition tube. The ITG Maxogen cone filter used in the kit provides nearly 30% more intake surface area over a drop in panel filter and has a unique venturi shaped outlet that reduces air turbulence.

Our scan tool measurements recorded increases of 25 grams-per-second of air through the mass air flow sensor (MAF) at various points of the rpm range, with a dramatically smoother flow curve. Dyno tests repeatedly show a 8-9hp power gain to the wheels!

The S-Flo installs completely within the stock airbox and therefore has a stock appearance and sound. Very stealth.

ITG air filters are reusable and need periodic cleaning. Please see this document on proper cleaning instructions. Air filter spray oil is available above.

Dyno comparison of AWE Tuning S-Flo intake vs. stock airbox on a 2001 Audi S4. Power is to the wheels (multiply by 1.28 for crank power). S-Flo horsepower is green line, S-Flo torque is blue line. The S4 used for this test is also equipped with AWE Tuning Twin2 exhaust.

Graph of measured differences between baseline and test in above dyno sheet. The S-Flo produced a peak increase of 5.5 ftlbs at 4000 rpms and 9 hp at 6500 rpms to the wheels over the stock airbox.