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This was a 200 hour test filter for the modified air cleaner box. That this post refers to. Not my ram air box. This 931 is used extensively offroad and does a lot of idle time in dusty environments. I think it used pretty much all the filter. Did not have any noticeable loss in power with this...

Took it out yesterday and towed my other 923 home about 30miles away. A huge noticeable difference on towing especially from a stop on a gradual incline (on ramp) I manual shift up but very very smooth pulling and no bogging. I don't notice a big change when I am empty unless I am up to highway...

Did not get any miles put on it today. I did idle it up to 1,700 rpms and let it run for a few mins. with the hood closed it did suck a sheet of paper directly over the inlet up flush. I do plan to double line the intake tube or wrap it with a head wrapping. it is quite fragile. I could not find...

I am doing this mod. It is a mockup. I am hoping to have it done tomorrow. 8 inch hole where the blackout light would be with expanded metal over it. I will run 8" ducting with a 90 degree elbow to dump it into the top of the filter. Same setup as the air inlet for the heater box. I am also...