Structural parts for internal combustion engines, namely, emission reduction units for motors and engines, namely, EGR valves, gaskets, head studs, O-rings, fuel injectors, exhaust systems comprising exhaust pipes for land vehicles and intake systems comprised of piping, sensor housings, air filters and dust boots; structural parts for vehicle exhaust systems, namely, mufflers for motors, headers, engine exhaust kits comprised of pipes, collector and muffler, tail pipes, engine exhaust tips, cooler pipes that allow air to travel to and from the motor; structural components for vehicle engines, namely, coolers for cooling down exhaust gases before exhaust gas is sent back into the motor, oil coolers, filtration kits consisting of oil filter block-off plates, brackets, coolant hoses and filtration components for engines, and hot air coolers to cool the air before it is re-introduced into the motor being structural parts of vehicle engines