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Not a whole heck of a lot. Beyond bolt ons, I'd go a different route. After building my 383 with around 400hp, my intent was to keep the stock airbox to maintain stock appearances, and it ran well. Ultimately I fabbed up a 4" intake and the difference was very noticeable. The small MAF housing is also a restriction, which I did away with when I swapped to the Holley EFI. What kind of power you lookin' at?
Not a whole heck of a lot. Beyond bolt ons, I'd go a different route. After building my 383 with around 400hp, my intent was to keep the stock airbox to maintain stock appearances, and it ran well. Ultimately I fabbed up a 4" intake and the difference was very noticeable. The small MAF housing is also a restriction, which I did away with when I swapped to the Holley EFI. What kind of power you lookin' at?
I'm guessing around 450 at the flywheel its not maf anymore its has a holley hp efi system too..I had the shop build this for it...
