My friend and I dropped an H22 in his 91' Accord. He decided to buy some stage2 cams from gude. He has alot of extra parts and only runs a 15.1 at best, he averages a 15.3. Anyway, I told him that with the stock valvetrain he is getting mad valve float, or at least that's what I think. I've always heard that you HAVE to get at least stiffer outer springs to maintain the amount of lift and duration he is producing. His Vtec hits very hard, but I still think he's getting valve float. I have a B18a in my 90' Teg, and was thinking of getting crower stage2, So what I'm asking is... is it really neccesary to buy the dualsprings and retainers?