3" ProStock Downpipe

Our long-awaited downpipe for the 3.5L Ford EcoBoost F150 is now available! This downpipe is our highest flowing and lowest restriction design for stock frame BorgWarner K03 turbos. Featuring TIG-welded stainless steel construction with a handmade low-angle merge collector, The driver’s side pipe connects using a 321 stainless steel flex section, for the best fit possible.

• Excellent fit and sound quality
• 321 Stainless flex section with precise slip fit simplifies a leak-free install
• Aerodynamic low-angle merge collector for reduced backpressure
• Improves turbo spool time and increases overall power
• Polished Stainless Steel finish
• Plenty of clearance for crossmember, mounting hangars and chassis
• Includes all gaskets and hardware needed for installation
• For competition racing use only, may not be used on any public roadway

Removal of OEM downpipe:

1. Unbolt exhaust, remove from vehicle
2. remove under tray and if applicable the front driveshaft’s metal shield
3. Support Transmission and unbolt shield from transmission crossmember, then remove crossmember
4. Remove Driver’s side upper rubber hangar
5. Remove/Unplug front and rear O2 sensors
6. Loosen OEM Downpipe’s clamp at driver’s side connection
7. Unbolt and remove OEM Downpipe from Driver’s side turbo
8. Unbolt and remove OEM Downpipe from Passenger side turbo
9. Inspect threaded surfaces at turbo outlet connection to downpipe, apply anti-seize

Installation of Full-Race 3" downpipe:

1.  Install front and rear o2 sensors off the vehicle.
2. Install Full-Race passenger side downpipe on passenger side turbo
3. Orient clamps on Y-pipe merge collector and insert driver side pipe into the slip-fit collector – do not tighten yet
4. With the passenger side downpipe in place, slip the entire Y-pipe and driver side downpipe into position. Some grease on the hangars can make this easy
5. Re-install Exhaust system, tighten connection to downpipes 
6. Carefully tighten the turbocharger to downpipe hardware, watching for proper alignment
7. Fully tighten clamps. Reinstall transmission crossmember and under tray/shields. Start engine and check for leaks

California Residents: This product does not have a CARB EO #; it is not legal for sale or use in CA on pollution controlled motor vehicles. This is intended as a "Race Only" product to be used solely for competition. It's use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization; any other use including recreational off-road use, may be a violation of local, state and federal laws. It is the buyer’s responsibility to verify legal use of this product for the intended application and use.