Adapt our high flow Modified 95 MM (100 MM Effective) Throttle Body (or the OEM LT5/ZR1 TB) to your LT1/LT2 Manifold with this flow efficient, self-centering Adapter. A smooth transition between the Throttle Body and the Manifold minimizes pressure (HP) losses found on straight bore Adapters. This Adapter seamlessly joints this larger Throttle Body to your Manifold or Supercharger. Transitional taper; ensures that there are no steps on the flow path and minimizes pressure losses/drops to manifold. Straight bore Adapters transitions are abrupt and drop manifold pressure. Hole pattern ensures throttle body, Adapter, and Manifold bores are concentric. Edge to edge, no steps due to mismatches. All clearance hole patterns adapters allow centerline shifts and bore mismatch. Proper sealing gland design and Low Compression set Silicone Seal to ensure durability and proper function of the seal. The excessive O-Ring squeeze is conducive to the O-Ring compression set and loss of sealing performance over time.