I've heard that putting a carb spacer on the stock intake manifold will net around 15 hp on a 500. Since my 425 uses the same type low rise intake manifold, it should give me an extra few hp also, if it's true. So anyone know if it's true or not? And what size spacer should I use if I try this?

Dunno man, but I'm putting this really super hardcore adapter on my stock intake manifold for my new edelbrock 750. OHHH YEAHHH. Jealous Dave? yeah I didn't think so...

I've never heard of them making that much difference but sometimes they can make a bit of a difference.

OHHH YEAHHH. Jealous Dave? yeah I didn't think so... :histeric: :histeric: :histeric: