I happened to see a banner on the site for S&B and clicked on it. What I found out was that the S&B guys actually claim that they conduct true ISO regulated tests on their filtration products. Doesn't necessarily mean much to me BUT based on the flow & filtration rates they claim they out perform the AFE, K&N, and Airaid systems for the filters compared. In order I believe it was Airaid (close 2nd), K&N (3rd), and AFE (Proguard 7 4th), AFE (Pro Dry S 5th). They post no HP or TQ #'s but #'s are always questionable. All things being equal if they all state that improved air flow and filtration = higher HP & TQ, it seems reasonable to think the one with the best stats wins in HP & TQ area as well.
Another thing, was they do not promote the use of a dry filter primarily because the technology behind dry filters has not been perfected to ensure that "dirty" air does not get into the engine. I can contest to that because I have always noticed that the CAI tube has a lot of soot in it even after it has passed through the filter and the inside of the filter is dirty. THis should not be. Examples I have experienced are on the AFE oiled filter, and the AMSoil dry filter replacement. In one instance the flow rate was so bad on the AMSoil filter that it collapsed the filter inwards when pulling my hauler up a grade (full boost).
Hope this helps.
2001 F350, 7.3L PSD, 4x4, CC, LB (71k mi), AFE Stage II CAI, 4" DP, 4" Jardine exhaust, PHP Tuner, Mag-Hytec Diff & Trans Pan, 6.0 Trans Cooler, Amp Research Steps.
SOLD (Glad I did) 2008 F450 Lariat, 6.4L PSD, 4x4, CC, 4.30s, (Job 1) , S&B Intake, Banks Six-Gun & SpeedBrake w/IQ, Banks Monster exhaust (DPF-back), Amp Research Steps, Custom RetrofitSource HID 5000k Projectors & fog lights, Train Horn. Still working on it...
SOLD (but wish I didn't) 2001 F250, 7.3L PSD, 4x4, CC, LB (139k mi), HX & pre-tank mods, AFE Magnum/Amsoil Air Filter, 3.5" DP, 4" Magnaflow exhaust, DPTuner F5, Autometer Z-series guages, MAP Sensor Line with Relief Valve, 8" Fabtech Coilover/4-Link conversion lift, Dirt Logic 4.0 & 2.25s, 37" Toyos on 20x9 ProComp 6001s, 4.10s, Firestone Air Bags, AMSoiled (Bypass filter), Mag-Hytec Diff & Trans Pan, TC Manual Lockup Sw., 6.0 Trans Cooler, Amp Research Steps. SPDiesel Exhaust Brake.