Bully Dog Exhaust Manifolds

Bully Dog exhaust manifolds provide a considerable upgrade from old stock manifolds, thanks to all of their notable features. Their high-flowing, state-of-the-art CAD design provides quicker turbo spool, higher power output, and more fuel economy for Class 8 engines. They feature ceramic coating inside and out to ensure engine heat is more extensively utilized to spin the turbo. This means the special metal alloy beneath the coating will absorb and radiate less heat—up to 300 degrees less coming off the manifolds. Bully Dog exhaust manifolds not only look great, but they're fine-tuned in every aspect to improve the performance of your engine. Order the model recommended for your specific vehicle and engine size. Features, parts, and specs may include: * 80 to 100 degree reduced exhaust gas temperatures (EGTs) * Up to 30 hp increase * Up to 18 percent more airflow over stock due to tighter tolerances, porting, and polishing * 3-piece design ensures matching expansion/contraction with engine heat * Thicker walls than stock for greater durability and ceramic coating help lengthen gasket life * Engineered to eliminate known failure points for greater durability * Turbo studs (depending on application) Show Less