HKS Dual Resonated Front Pipe - Toyota 86 Scion FRS Subaru BRZ 33004-BT002 by HKS | SKU: 0E06G No reviews Regular price $315.00 USD Sale price $315.00 USD Regular price $350.00 USD Sale Quantity - + Sold out Product Info Straight design without catalyzer = Power Up, because of the low exhaust pressure. (Complied for Step-up tuning.)Pipe Size : 60mmFEATUREThe main part for the high output is the exhaust manifold shown on the following graph.We recommend having a total full straight exhaust tuning by having more power by changing the muffler and exhaust manifold and tune the sound with the front pipe.* If the exhaust manifold is changed, the engine check light might be turn on for a certain combination. So the muffler + front pipe combination is an effective choice.Straight design and still clear soundThe catalyzer-less straight pipe will have bad noise. So we have tested for frequency analysis as shown on the graph, and tuned the sound with 2 resonators.