Private Label MFG Power Driven FRS / BRZ / FA20 UNEQUAL LENGTH HEADER integrates a true 4-1 merge collector.. The UEL header delivers low to mid end power while utilizing a one piece design which maximizes the engine compartment space which is a direct bolt on replacement for your stock manifold. The header will bolt up to the stock location of the over pipe. This exhaust manifold is ideal for all forms of competition; Autocross, drag racing and road racing