It has been documented by the Honda engineer that the current Accord V6 does gain more power using a higher octane fuel such as 91, 92, or 93 octane gasoline. I'm not sure but I believe it was USA Today that had the article. Maybe do a search with a search engine for the article.

There is a member on another Accord forum that has a custom made turbo charged 6spd Accord Coupe. If the Accord Coupe is red w/ the OEM factory lip kit then yeah he's probably pushing 300hp to the wheels.

But nope... a lot of Accord V6 owners are dynoing at around 220hp to the wheels SAE corrected with minor bolt-ons and some tuning. Not much is out for the Accord V6 other than a few intakes and exhaust systems. Unless the Accord is spraying w/ nitrious.

I just recently added the Greddy Evo 2 dual cat-back exhaust system to my 03' Accord V6 Coupe. Very happy w/ it!