A'PEX Front Pipes replace the factory downpipe and catalytic converter and significantly improve exhaust flow. Stainless steel flex joints are used to dampen the cat-back exhaust system from engine vibrations. A'PEX Front Pipes are available in two different grades. N-1 Front Pipes are manufactured using aluminized steel and treated with high-temperature titanium particle coating. GT Front Pipes are constructed entirely of SUS 304 stainless steel. A'PEX Front Pipes are for race use only.