The car underview shows the extremely well engineered design of the APS exhaust system Optimum gas flow and minimal exhaust back pressure is essential for high power. The APS high output 304 grade stainless steel exhaust system really performs. Careful attention to tube diameter, smooth radius mandrel bends and muffler design is essential for high performance. With 20 years of experience in exhaust system design, APS has produced the ultimate XR6 Turbo exhaust system. A huge 3.5 inch tube scavenges hot exhaust gasses from the turbocharger, through the innovative APS catalytic convertor where it continues as a single 3.5 inch tube to the mid mount muffler. Internally the muffler splits the exhaust gas flow into two smooth bore 2.5 inch pipes which are routed over the rear axle assembly and into the APS High Output twin 2.5 inch resonator. A single 3" turbo to tailpipe exhaust system was eliminated early during the development process due to a number of reasons. Firstly, a 3" exhaust with a 3" catalytic convertor is not sufficiently large enough in volume to deliver low exhaust back pressure at turbo pressures of 9 psi and above. In addition, the APS twin 2.5" rear section provides greater clearance and reduces radiant heat loads to the plastic fuel tank. An added benefit of utilizing twin 2.5" rear section is the elimination of the highway drone issues faced with a single 3" exhaust. Click the image to hear the sound of the APS exhaust system APS has produced a perfectly balanced total exhaust solution - the cross sectional area of the 3.5" front exhaust at 9.61 in2 (62.1 cm2) grows to 9.81 in2 (63.3 cm2) in the twin 2.5" rear section. Compared to the cross sectional area of the standard exhaust at 7.9 in2 (51.3 cm2) and a tiny 7.1 in2 (45.6 cm2) of a 3" exhaust, the APS system delivers a huge reduction in back pressure at high power levels. The end result is an exhaust system designed to support high outright power levels of over 500 horsepower, with strong mid range torque. All this with improved turbo response (less lag) and maximum durability. APS has also gone to great lengths to custom design the highest quality catalytic converter - fully imported from Germany. Whilst the standard catalytic convertor is less restrictive than most after market performance cats available in Australia, the APS cat is streets ahead again. With true 3.5 inch inlet/outlet connections, it features a high flowing stainless steel monolith packed in stainless steel mesh. No other aftermarket converter (and few O.E.M. pieces) are constructed to such a high specification level. Careful attention has been paid to exhaust noise and note. A strong but subdued exhaust note, comfortable highway cruise and well matched to the dynamics of the Falcon XR6 Turbo. The APS High Output Exhaust system is engineered as a complete system including every nut, bolt and gasket required for installation. As always APS has gone well beyond common aftermarket engineering levels to create the ultimate XR6 Turbo exhaust system - regardless of cost. Why settle for anything but the best! APS XR6 T Exhaust System - Design Criteria High power, low noise, EPA legal. • Must produce high power, have extremely low back pressure, comply to ADR 79/00 engine emission test and not exceed the 90 dB EPA noise test, have acceptable NVH at cruise speeds between 40 to 160 KPH.   Cat Converter   • A 3 ½ “ Euro 3 spec high performance Cat Converter is utilised to ensure low back pressure. • At maximum rated power 330 kW the back pressure is less than 2 PSI, compared to the stock Falcon converter which has 7 PSI back pressure at 240 kW Intermediate Pipe 3.5" • The intermediate pipe is manufactured in 304 grade stainless steel. Tube size is 3.5”, exhaust flanges 304 stainless steel. • Objective high gas flow, reduced back pressure and long service life. Intermediate Muffler • Single 3.5” entry, spills into twin 2.5” passages. Objective: high gas flow, low back pressure, low exhaust noise. Tube size is 3.5”, exhaust flanges 304 stainless steel. • Constructed in 304 stainless steel, internal and external, twin 2 ½ outlet tubes, 304 stainless exhaust flange. Tail Pipe Rear Muffler • Twin 2 ½ pipes into rear twin 2.5” muffler with twin 2.5” stainless steel tips. • Complete assembly including exhaust flanges 304 stainless steel. Tig welded. • Objective: high gas flow, low exhaust back pressure, high power, low noise EPA legal. Exhaust system Testing • Easily passes EPA stationary noise test. Actual result 87 dB at 3900 RPM EPA specified test. • Emission test as part of the Phase II system power continued compliance to ADR 79/00. • Produces 330 kW (450 HP) as part of the Phase II System with less than 2 PSI total exhaust back pressure. • Extremely low NVH at cruise speeds of 40 to 160 KPH. Exhaust Summary Building and testing a number of different combinations with 3” Cat Converters and single 3” exhaust systems on the XR6 T, proved that this approach is technically flawed, produces high noise and virtually no additional power over the stock XR6 T exhaust systems. The APS engineered approach for an improved XR6 T exhaust system is a winner in every aspect, and ultimately provides high power with street legality. To see more components for the Ford XR6 Turbo click HERE If you would like further informatio on the APS High Power Exhaust for the Ford Xr6Turbo, please do not hesitate to contact Autotech Engineering via email on sales@autotechengineering.com.au or by phone on (02)9897 1378