Dinan Free Flow Axle Back Exhaust | 2018-2020 BMW M550i (D660-0075) Dinan

2018-2020 BMW M550i Stainless Steel Axle Back Exhaust by Dinan

The G30 M550i exhaust ushers in a new era of Dinan exhaust design. To date, Dinan has

been synonymous with welded on, thin-walled tips and a philosophy of exuding a civilized note when you

want it to be, and a pleasantly aggressive one under hard acceleration. While the mantra is maintained,

albeit tweaked with the emergence of mid-pipes and resonator deletes to those who want an even more

aggressive sound, the styling of the tips is being drastically transformed. The new massive 4″ diameter

tips on the M550i exhaust are the biggest we have done thus far in addition to being double-walled the

polar opposite of our normal thin-walled style. Perhaps most importantly however is the new tips are

clamp-on. Not welded as in the past, so they can be easily swapped to new styles or replaced as the need

arises.

Internally, the exhaust is typical of other Dinan exhausts and is designed to improve

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 hard acceleration. This is partly

courtesy of the retained computer-controlled exhaust valves that limit noise during low-speed driving and

open fully during high-load conditions to allow free flow. Like all Dinan exhausts, our M550i Free Flow

Axle-Back Exhaust is engineered to reduce low-RPM drone so the cabin of the vehicle is still intimate and

not drowned in an excessively loud tone. In fact, on the G30 M550i equipped with a Dinan exhaust, you

will be astounded at how eerily quiet it is in the cabin. That is quickly changed however when exiting

the vehicle and being witness to the sporty luxury sedan revving its stout V8 engine with the exhaust

valves wide open. Blissfully bellowing a sweet deep tone that begs for more is the reward. When you

succumb to those desires the throaty note at full load is even more rewarding letting all those around

you know your M550i is seriously capable yet dignified at the same time.

Features

• Four massive 4″ diameter clamp-on, double-walled, polished or ceramic black, laser engraved exhaust

  tips

• 100% 304 stainless steel construction
• Computer controlled exhaust valves are retained and limit noise during low speed driving and open

  fully during high-load conditions

Benefits

• More Power: + 8 HP @ 6600 RPM, + 6 LB-FT @ 6600 RPM
• Enjoyably louder, sportier sound
• Easy bolt-on installation with included mounting hardware

Applications

• 2018-2020 BMW M550i

What’s In The Box?

• 1 – Axle Back Exhaust

References

• Installation

  Instructions

Warranty

• Manufacturer Standard Warranty