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I'm back with a question for my 455ci T/A?

now if i buy this would increase the HP? I have a lot of hop up parts and i'm trying to sell her,she's faster then a jack rabbit.But i was thinking about getting these . http://store.summitracing.com/partdetail.asp?part=CCA-857-16&autoview=sku

Public Comments

1. Of course it'd add a few HP. Why you trying to sell her?
2. Do you have a roller cam? You can't use roller lifters on a flat tappet cam You will need a roller cam, roller lifters, cam stop button, block thrust plate, and maybe a diff dizzy gear to go to a roller cam/lifter setup on your 455
3. If your cam isn't a hydraulic roller cam those won't work, I don't think the stock 455 cam is a roller cam.