I finally have my new heavy-duty trunk springs in and they are great. I adjusted them so that the trunk opens all the way up on its own, even with my aftermarket spoiler on! You definitely need the tool to install the new springs. Acura wanted about $7.50, but didn't have it in stock, so I went to a Honda dealer and they had it for $9.99...since when did Honda charge more than Acura??? Anyway, it was well worth the extra $10 and literally 10 minutes to remove old torsion bars and install new ones. Dealer wanted $42 and said it would take 30-45 mins. What a bunch of crap...