If anyone has this I'd like to know how it works. I am making of list of things to get for power looks ect, for my Blazer and if this works I just might invest.

http://www.performanceproducts4trucks.com/productpage.aspx?pid=110872&name=VMAX+Manifold+Spacer

My guess is HYPE, Beside's that looks like a lot of work for only twenty one horse's. Just my opinoin...

it will gain some power, but i think the 21 claim is high, 5ish maby, and as DINO55 said, its a lot of work for little gain, save the 300 bucks for your next 2 tanks of gas, and without that power you wont be tempted to get into the gas and burn more of it