Dinan Freeflow Stainless Exhaust with Black Tips for the BMW F26 X4 M40i

SKU: D660-0074-BLK

Dinan's Free Flow Exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be and pleasantly aggressive under harder acceleration with zero drone.


This item is worth 3 point(s) towards your Dinan Badge.
$1,499.95 $1,349.96
Please note: Due to size and weight there will be a shipping surcharge of $90.00 for this item.
  WARNING: This product can expose you to chemicals including Nickel (Metallic), chromium (hexavalent compounds) and Lead which are known to the State of California to cause cancer and birth defects, or other reproductive harm (For more information go to www.p65warnings.ca.gov)
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Product Description

Designed for the crowd that want a dose of additional grunt in their X4 M40i Dinan delivers an exhaust system that offers improved tone and aggression over its stock counterpart.  The first of the "pancake" style mufflers to make it to a BMW chassis the X4 M40i created a unique engineering problem to solve and challenged the Dinan engineering team to produce additional volume and tone out of a much smaller and compressed can.  After many permutations a tweaked helmholtz design was chosen that not only reduced resonance (or drone) at low RPM but also improved exhaust flow courtesy of reduced back pressure. Additionally, and most importantly, this design afforded the closest tonal change to that synonymous with a Dinan exhaust system — a deep and smoothe sporty sound that is civilized when you want it to be and pleasantly aggressive under hard acceleration. 

The system is built to exacting specifications to ensure perfect fit using the factory hangers. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 89mm (3.5") laser engraved ceramic black or polished exhaust tips for a tasteful, high-performance look.

Benefits of the Dinan F26 X4 M40i Free Flow Axle-Back Exhaust:

+5 HP @ 6600 RPM, +4 FT-LB @ 6600 RPM
Twin 3.5" black ceramic coated and laser engraved exhaust tips
+ Easy bolt-on installation with included mounting hardware
Enjoyably louder, sportier sound
100% 304 stainless steel construction
Computer controlled exhaust valve is eliminated

Product Specifications
Max HP Gain5 @ 6600 RPM
Max Torque Gain4 @ 6600 RPM
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Dinan offers you complete peace of mind by providing the only factory matching bumper to bumper warranty in the industry(most products).  More Details>>