Buddy Club Racing Spec exhaust manifold is designed with the competition aspect in mind. Designed to the highest quality and extracted the most possible effective horsepower from the engine. With a 4-2-1 design the exhaust manifold increases performance and response through out the entire rpm band. Although made for all B-Series engines, flange orientation may slightly need to be modified. Buddy Club racing adjustable test pipe included to assit in extracting that extra power and eliminating any restrictions.