Additional Images

aFe Twisted Steel Headers Down-Pipe *RACE ONLY* SS-304 12-14 BMW 335i L6-3.0L N55 w/ 300 CPSI Cats

Street Series Elite Down-Pipe; Twisted Steel; 4 in.; 304 Stainless Steel Tubing; Brackets; w/400 CPSI High-Flow Catalytic Converter; +10 HP/+16 Lbs. x Ft.;
Not Available
Availability: Usually ships within 24 hours
Was: $939.91
Sale: $904.00
Save: 4%
Save: $35.91


Exhaust Pipe

Street Series Elite Down-Pipe

Street Series Elite Down-Pipe; Twisted Steel; 4 in.; 304 Stainless Steel Tubing; Brackets; w/400 CPSI High-Flow Catalytic Converter; +10 HP/+16 Lbs. x Ft.;

  • Bend Angle: N/A
  • California Air Resources Board (CARB): No
  • Center Line Radius: N/A
  • Finish: Brushed
  • Gauge: OEM
  • Inlet Inside Diameter: 4.000 in.
  • Inlet Quantity: 1
  • Material: Stainless Steel
  • Muffler Count: None
  • Position: N/A
  • Tube Diameter: 4
  • WARNING CA Proposition 65: Yes
  • WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm -

  • 4 in. Dia. 304 Stainless Steel
  • 300 CPSI Stainless Steel High Flow Catalytic Converter
  • Retains Factory O2 Sensors
  • 100% TIG-Welded
  • No Modification Necessary
  • Hassle Free Installation
  • OE Style Brackets
  • OE Style Turbo Flange
  • Prevents Check Engine Light

aFe is proud to introduce the aFe Twisted Steel? Down-Pipe with a 300 CPSI high-flow catalytic converter for the 2012-2014 BMW F30 335i with the L6-3.0L (N55) engine. In testing this system resulted in a max gain of 10 horsepower and 16 lbs. x ft. of torque and outflowed the restricted OE catalytic converter by up to 150%. This high performance down-pipe delivers the perfect balance of pure, race-inspired performance, in-cabin driving comfort and the excitement of exhaust sound and tone during normal cruising or aggressive hard throttle. aFe also included a massive, lightweight, 4" diameter, 304 stainless steel tube with a 300 CPSI, high-flow catalytic converter. The catalytic converter is not only environmentally friendly it also prevents check engine lights.

Advanced Flow Engineering, Inc. (aFe) produces high flow, high performance air filters & intake systems for the automotive industry. Founded in April, 1999, aFe was created to address an obvious need in the automotive aftermarket industry: a lack of choice for a high performance aftermarket air filter. We are a team of engineers, machinists, production and sales people who believe in the product we design. We each have years of experience in our respective positions and together work to ensure that we have the best product on the market. Our purpose was not just to be another vendor that offers air filters, we chose to pay attention to those finer details that set an aFe filter apart from the competition. We currently offer aftermarket air filters for passenger cars, light trucks and SUV's. We also have many applications for round racing and universal clamp-on filters. To find your particular application, please use our new search engines. If you do not see your particular application listed, please contact us.

Compatible Vehicles


  • 48-36310
  • 48-36310
  • 802959480298
  • Advanced FLOW Engineering
  • Temporarily Not Available
  • Usually ships within 24 hours
  • New

Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W24.0000” x H12.0000” x L12.0000”
  • Free Shipping!