After two years of design and testing, APS is proud to announce the release of the APS Tapered Turbine Entry Duct (Up-Pipe).

   A complete bolt-on assembly including cast up-pipe and a truly innovative Double Wall 321 stainless steel flex coupling that incorporates an internal 321 stainless steel Endurance flow tube.

   To achieve high exhaust gas speed, the turbocharger entry duct must be manufactured with a precise internal taper. As it is all but impossible to achieve a precise taper in stainless steel tubing over the entire distance of the duct, the APS Tapered Turbocharger Entry Duct is cast in a high nickel content ductile iron. This material also provides maximum durability under extreme exhaust gas temperatures and it is the unique internally tapered profile that ensures optimum exhaust gas speed. The result is crisp turbocharger response and the highest horsepower possible under all driving conditions and at any engine speed.

   As a truly bolt on system, the APS Tapered Turbine Entry Duct matches the standard WRX and STI turbocharger entry port and stud pattern and is therefore suitable for use with the stock TD04 Mitsubishi turbocharger, the VF series turbochargers as well as the extensive range of APS S/R Series Ball Bearing Performance turbochargers.

   In order to further ensure a positive, leak free seal, the APS Tapered Turbine Entry Duct is supplied complete with A286 gas turbine fastener material studs, flanged self locking nuts and genuine OEM flange gasket.

   The APS Tapered Turbine Entry Duct (Up-Pipe) provides optimum performance, response and component durability under extreme load and high horsepower applications. It is a perfect partner with the APS range of S/R Series Ball Bearing performance turbochargers.