These Manifolds Complement The Many Carburators Available For Your Vw. Each Cast Manifold Is Designed To Utilize The Specific Characteristics Of The Carb Which It Is Made. All Surfaces Have Been Machined For Complete Sealing. You May Experience Clearence Problems On Some Fan Shrouds When Using Dual Carbs. Sold As A Pair. Offset Which Allows The Decklid To Close.