Deck Lid Stand-off -- which is better, Top or Bottom

[Jon]

I guess the Helper would make a cushion of air on top, and thereby reach into the laminar layers of air...  can't all be placebo? 

[volkskris]

the herrod helper would help a lot more if you'd fit it above the windshield. of course it would look like sh*t then. that's why remmele mounts there spoiler above the windshield. much more effective.