This Southern Jet unit is the 178mm (7”) two stage, this is a perfect match for a large range of high horsepower four cylinder engine packages as well as a range of V6's.This unit features very high tensile one-piece stainless-steel impellers, high quality grill with high tensile wear plate bars, high tensile fabricated bash plate, high tensile stainless-steel stater vane, well designed ducted reverse bucket, it is finished in a durable black powder coating and is equipped with the highest quality/ tolerance trim nozzle. Also has a high tensile main shaft and drive coupling, high quality SKF main bearing and a bearing housing breather. All of these high quality components add up to excellent performance and extreme durability.