http://www.spiralmax.com/

Has anyone ever used the spiral max with their Blazer. I was looking at it online and was wondering if it really worked, I have a 96 Blazer with the 4.3. Any ideas let me know.
http://www.spiralmax.com/

Scam, worthless and will actually reduce power seeing it blocks the intake quite a bit. You already have vortec heads stock on your vehicle.