Select the vehicle you are shopping for:





My Garage:

This part is model specific. Please select a vehicle above to ensure that you get the correct part.

Twisted Steel Racing Down-pipe - AFE

PART#: 48-36311

BRAND: aFe Power

Be the first to review this product

Typically ships in 1-2 days.

NOTE: Upgrading to expedited shipping will not shorten the “ships in” time listed above.

Direct Ship

$496.84 / each
Ships for free if total order exceeds $99

aFe's non-catalyst Twisted Steel down-pipe for the N55 engine outflows the factory piece by up to 190 percent. In recent testing the system gained 13 horsepower and 27 foot pounds of torque over stock. This high performance race pipe delivers pure, race-inspired raw power and also produces an aggressive and exciting exhaust sound during hard throttle application.

  • Tig-Welded: 100% TIG-welded by certified craftsmen for race proven strength and durability. TIG-welding provides the strongest welds reducing stress cracks.
  • Tapered design: A unique 4" diameter 304 stainless steel taper design is used to increase manifold velocity and increase usable torque. This means more aggressive throttle response and increased passing power.
  • Factory 02 Sensor Locations: Factory mounting locations for all 02 sensors.
  • Hassle-Free Installation: OE style brackets are included for a hassle-free installation.
  • Lifetime Warranty

aFe down pipes are manufactured in Corona, California

We suggest purchasing a new down-pipe gasket part number 18 30 7 581 970 for installation.

Note: This is a "Race Only" product 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, could be in violation of local, state and federal laws.

A check engine light will emit and aFe recommends using a programmer but it is not necessary.

Write Your Own Review

You're reviewing: Twisted Steel Racing Down-pipe - AFE

How do you rate this product? *

1 1 star
2 2 star
3 3 star
4 4 star
5 5 star

advanced FLOW engineering, inc. (aFe Power) is a manufacturer of high performance automotive cold air intake systems, performance air filters, fluid filters, throttle spacers, turbochargers, intercoolers, differential cover, transmission pans, headers and exhaust systems. aFe is headquartered in Corona, California in two facilities totaling 164,000 sq. ft. including their 77,000 sq. ft. headquarters and manufacturing facility. An 87,000 sq. ft. warehouse and R&D facility was added in 2012.

aFe's product line up currently includes over 2,300 part numbers, which are all designed, developed and manufactured in their Corona, CA location. aFe Power puts a great deal of focus on the BMW category with one of the most complete lines of performance products for BMW. The aFe Power product line-up includes performance air filters, cold air intake systems and exhaust systems. Many members of the aFe Power team, including their president, are BMW enthusiasts and you will find dozens of new products for various BMW applications launched every year.

Everything we sell comes with a minimum 12-month warranty and a 100% satisfaction guarantee. In addition, products that carry the Bavarian Autosport brand come with a minimum 2-year warranty against defects in materials and workmanship. (Some have lifetime warranties!) If you are unhappy with a product's quality or performance, simply let us know. We'll make it right. Call us at 800.535.2002 or e-mail [email protected].


NOTE: Clicking links will set/change vehicle selection.

See more