Originally posted by British Banger:
He does however, has the larger lower intake manifold.
David is using a 3 liter lower intake modified to work with the 2.5 upper. The 3 liter lower measures at 34/35mm primary/secondary. The ones Sho Shops has is even larger at 37/35mm primary/secondary. The larger manifolds combined to 15HP gain over SVT intakes on the 3 liter according to Sho Shops.