advanced FLOW engineering Instruction Manual P/N: 48-36301-1 DOWN PIPES Make: BMW Model: 335i Year: 2007-2010 Engine: L6-3.0L (tt) N54 E90/92/93 Make: BMW Model: 135i Year: 2008-2010 Engine: L6-3.0L (tt) N54 E82/88 Make: BMW Model: 335is Year: 2011-2012 Engine: L6-3.
• Please read the entire instruction manual before proceeding. • Ensure all components listed are present. • If you are missing any of the components, call customer support at 951-493-7100. • Ensure you have all necessary tools before proceeding. • Do not attempt to work on your vehicle when the engine is hot. • Disconnect the negative battery terminal before proceeding. • Retain factory parts for future use. Label A B C D Qty.
A B Page 3 C D aFepower.
REMOVAL Figure A Refer to Figure A for step 1 Step 1. Remove the (4) flange nuts using a 12mm socket and save for reuse. Replace the flange gaskets if they are no longer serviceable.
REMOVAL Figure B Refer to Figure B for step 2 Step 2. Remove the down pipe bracket off the OE down pipes and off the transmission. Page 5 aFepower.
REMOVAL Figure C Refer to Figure C for step 3 Step 3. Remove passenger side steering rack mounting bolt. Loosen the driver side as well. Swing steering rack forward for easier access to turbo connections.
REMOVAL Figure D Refer to Figure D for steps 4-5 Step 4. Remove all four O2 sensors using a 7/8" wrench after marking their location. Step 5. Loosen the V-band clamps at turbo outlets using a 13mm socket. Page 7 aFepower.
REMOVAL Figure E Refer to Figure E for steps 6-7 Step 6. Remove the front down pipe first. Step 7. Remove the rear down pipe.
REMOVAL Figure F Refer to Figure F for step 8 Step 8. The tall heat shield screw will need to be replaced with a shorter 10mm hex head screw. Page 9 aFepower.
INSTALL Figure G Refer to Figure G for steps 9-13 Step 9. Install the new rear down pipe first. Step 10. Assemble the V-band clamp using a 13mm socket, but do not fully tighten at this time. Step 11: Install the front down pipe using the original V-band clamp using a 13mm socket but do not tighten. Step 12: Re-install the OE down pipe bracket to the transmission and aFe down pipes (You may need to rotate to align) and tighten. Step 13: Tighten both V-band clamps.
INSTALL Figure H Refer to Figure H for step 14 Step 14. Reinstall the O2 sensors with anti-seize paste and tighten using a 7/8” wrench. (Note: It may be necessary to add slack to the O2 sensor wire by adjusting the wire harness from under the hood.) Page 11 aFepower.
INSTALL Figure I Refer to Figure I for steps 15 Step 15. The rear flanges can be reconnected using the new gaskets or the originals if still serviceable. The use of anti-seize is recommended on the flange studs.
INSTALL Figure J Refer to Figure J for steps 16-17 Step 16. IMPORTANT; Return the steering rack to its original position and torque to factory specifications. Step 17. Your installation is now complete. Be sure to retighten all connections after approximately 100 miles. Page 13 aFepower.
Scorcher Module P/N: 77-46302 Cat-Back Exhaust Black P/N: 49-36302-B Stage 2 Intake Stage 2 Si Intake P/N: 54-11472 P/N: 54-82002 Cat-Back Exhaust Polished P/N: 49-36302-P Cat-Back Exhaust P/N: 49-36302 Stage 2 Si Elite Intake P/N: 50-81472 Dynamic Air Scoops P/N: 54-11478 To purchase any of the items above, view airflow charts, dyno graphs, photos, and video please go to aFepower.com.
Warranty General Terms: • aFe warrants their products to be free from manufacturer’s defects due to workmanship and material. • This warranty applies only to the original purchaser of the product and is non-transferrable. • Proof of purchase of the aFe product is required for all warranty claims. • Warranty is valid provided aFe instructions for installation and/or cleaning were properly followed. • Proper maintenance with regular inspections of product is required to insure warranty coverage.
advanced FLOW engineering, inc. 252 Granite Street Corona, CA 92879 TEL: 951.493.7100 • TECH: 951.493.7100 x23 E-Mail:Tech@aFepower.
