Such as ASM and Amuse Lagalo.

I found a picture of a nice channel venting the air out of an ASM fender that also blocked the rest of the inner off from debris but can't seem to find it again -- I'm assuming it was a one off race car thing however. If you're running fenders like these, or any aftermarket fenders for that matter, what does the inner fender look like? Do you just collect a bunch of crap in between the frame and fender? Heavily modify the stock liners?

Thanks

 

1: you do not run liners and collect a bunch of crap you need to clean out
2: You run liners and defeat the purpose of the fender. (fenders are also wider than the liners so there is still a gap)

I recently purchased liners and will be trimming them and making a duct. So essentially air and dirt will only come out of the fender hole.

 

That's what I figured. Thanks.

Everyone loves fenders like these but no one ever talks about the practical aspects.