Product: Cadillac ATS 2.0T Downpipe. Part Numbers: Downpipe 2.0T - with catalytic converter Downpipe 2.

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1 Product: Cadillac ATS 2.0T Downpipe Part Numbers: Downpipe 2.0T - with catalytic converter Downpipe 2.0T - Race Only Applications: Cadillac ATS 2.0T, Current Description: These downpipe is engineered to be a high performance exhaust system for your 2.0T ATS. Tube diameter and flow path have been optimized to reduce turbo backpressure and maximize boost response and horsepower. Rev. 7/5/2013

2 What s in the box: Item Qty Downpipe 1 Flange Gasket 1 Difficulty of Installation: Beginner x Advanced Reason: This product involves careful fitment and the use of a lift is recommended. Expected Installation Time: 1.5 Hours Recommended Tools: 3/8 drive ratchet & extensions 1/2 drive ratchet & extensions 13mm wrench 15mm wrench 15mm ratcheting wrench 22mm wrench 10mm socket 13mm deep well socket 15mm deep well socket Various ratchet extensions and swivels Torque wrench Mechanics hook or pick Anti-Seize compound 2

3 Prepare Vehicle for Service This installation should be performed by a professional installer. If you do not have proper tools, safety equipment, and training you run the risk of injuring yourself of damaging your car. The use of a lift is strongly recommended to perform this installation. It is highly recommended to spray various nuts and bolts in the factory exhaust with a penetrant such as PB Blaster or WD40 and allow it to soak for a few hours to avoid seized or broken bolts. Step 1: Disconnect Battery Remove the negative battery cable to battery nut and separate the cable from the battery. Step 2: Remove Turbo Heat Shield Remove the 3-10mm head fasteners holding the heat shield to the turbo and exhaust housing. Remove the housing and set aside for re-use along with the bolts. PHOTO HERE: Step 3: Disconnect O 2 Sensors from Engine Wiring Harness Disconnect the primary and secondary O 2 sensors from the engine wiring harness. The primary sensor connector can be found near the rear of the cylinder head on the driver s side. The secondary sensor must be disconnected from underneath the vehicle The primary O 2 sensor connector is black, secondary O 2 sensor connector is gray. 3

4 OEM Downpipe Removal Step 1: Separate downpipe from main exhaust system Remove the two nuts securing the main system to the downpipe. (15mm deep well socket). Step 2: Remove Primary O 2 Sensor Remove the primary O 2 sensor from the upper end of the downpipe (22mm wrench). This allows extra clearance for removing nuts in the next step. Retain the O 2 sensor for use in your Pfadt downpipe. PHOTO of O2 SENSOR HERE: Step 3: Remove Downpipe Bracket Bolts Working from the top, remove the bolt that holds the downpipe to the engine block (13mm socket). Working from under the car, remove the lower bracket assembly near the outlet flange of the OEM downpipe. This is two pieces and holds the lower end of the downpipe to the engine oil pan casting (13mm socket). UPPER MOUNTING BRACKET BOLT 4

5 Step 4: Separate downpipe from turbo outlet flange Remove the 4 nuts securing the downpipe to the outlet flange. A combination of 15mm deep socket on a 3/8 ratchet and 15mm ratcheting wrench will make the job easiest. Step 5: Remove downpipe from vehicle The downpipe should be loose now. Slide the upper flange off of the mounting studs and the lower studs out of the mating flange. The assembly can now be removed through by lifting it up past the top of the engine. Step 6: Remove O 2 Sensor Remove the secondary O 2 sensor from the factory downpipe (22mm wrench). Retain the O 2 sensor for use in your Pfadt downpipe. 5

6 Pfadt Downpipe Installation Procedure Step 1: Install Secondary O 2 Sensor Apply a thin coat of sensor safe anti-seize to the threads on all O 2 sensors. Install the secondary sensor into the downpipe (grey connector). Use the 22mm wrench and torque to 31ft-lb. Step 2: Place Downpipe in Vehicle Coat the turbo outlet flange studs with a light layer of anti-seize. Install the provided new gasket into the upper flange on the downpipe. The gasket will protrude out from the face. Install the downpipe in the vehicle by feeding it through from the top of the engine area. Use care to not damage the O2 sensor that you have already installed. Slip the upper flange over the mounting studs. Reusing the OE 15mm hex flange nuts, start at least one nut to retain the pipe in place. Install the bolt through the new downpipe mounting bracket. This is now best reached from underneath the vehicle. Do not tighten it yet. MOUTING BRACKET BOLT 6

7 Step 3: Connect Downpipe to Main Exhaust Place the OE gasket on the studs of the Pfadt Downpipe and assemble it to the rear section of the exhaust. Re-use the OE (15mm hex) nuts for this joint. Start both nuts on the downpipe studs to hold the system together. Step 4: Tighten and Torque All Fasteners Start by torqueing the upper flange bolts to the turbo outlet housing (15mm deep socket). The torque spec on those nuts is 32 ft-lb. Next, torque the mounting bracket bolt to the block (13mm socket). Torque spec on that bolt is 18 ft-lb. Finally, torque the outlet flange of the downpipe to the full exhaust system (15mm deep socket). The torque spec on those nuts is 32 ft-lb. Step 5: Final Assembly Install the Primary O2 sensor into the upper port on the Pfadt downpipe. ). Use the 22mm wrench and torque to 31ft-lb. Reconnect the sensor to the engine wiring harness. Be aure that the sensor wiring will not contact and hot components. Tie off if necessary. Re-connect the Secondary O2 sensor wiring to the main engine harness. Re-install the Heat Shield and torque the bolts to 89 in-lb. Re-install the battery cable. Step 6: Check for Leaks Double check that all fasteners have been tightened, wiring is not dangling on the any exhaust components, spilled oil is wiped off, and that there is adequate clearance between the exhaust and any other components. Start the car and check for exhaust leaks, oil leaks, or coolant leaks. Congratulations, you have successfully installed your new Pfadt downpipe. and are now ready to reap the rewards of a carefully engineered exhaust system! 7

8 Fastener Torque Specifications Torque Spec Application Metric English Heat Shield Bolts 10 N-m 89 in-lbs Turbo Outlet Flange Nuts 44 N-m 32 ft-lbs O2 Sensor 42 N-m 31 ft-lbs Downpipe Mount Bracket Bolt 25 N-m 18 ft-lbs Downpipe Outlet Flange Nuts 27 N-m 20 ft-lbs Please contact Pfadt Customer Support with any questions! Warranty and Use Restrictions Our warranty covers the workmanship and materials for the original purchaser on the original vehicle of installation for five years. Parts that are sold to another person or removed and installed on another car are excluded. Catalytic converters are covered for one year. Pfadt is not responsible for premature failure of a catalytic converter due to tuning/tuning related issues or other negligence on the part of the installer or end user. If you have a catalytic converter failure outside the limits of the warranty, we will ONLY charge you for the replacement of the cats and provide you with a free mid-pipe for up to 5 years from original date of purchase. Pfadt reserves the right to replace individual components. All Pfadt downpipes are for off-road use only. These exhaust systems are intended for use on racing vehicles (i.e. a competition vehicle used exclusively for competition on closed-course circuits) and do not require an exemption or Executive Order from CARB to be sold in California for such purpose. However, such parts are prohibited from use on many state s public roads, including California, even if occasionally used off-road. 8

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