New Holley Sniper sheet metal tunnel rams

Pascamp said
The one for LS engines is a great piece. Has different tops available for carbs or EFI. Engines in the 350-370ci range usually peak in the low 7k range, 402-427ci usually peak in the mid 6k's. Not much midrange drop off either.

Did you actually use one and if so, how much did you do to it before you ran it. I can see it's not a bolt on in my world.