Akrapovic BMW M440i (G22, G23) Slip-On Line (Titanium) (Requires BMW Part #18308686640) 2021-2027

The Akrapovič BMW M440i (G22, G23) Slip-On Line (Titanium) (Requires BMW Part #18308686640) (part S-BM/T/31H) is a Slip-On Line exhaust for the BMW M440i (G22/G23). On the Akrapovič dyno it added 4.6 hp and 9.1 lb-ft, tested on a BMW M440I (G22, G23).

Benefits

A Slip-On Line replaces the rear silencer section of the exhaust and bolts on behind the factory catalytic converters. It is the most direct way to change how the car sounds and how much the back of the car weighs, without touching the emissions hardware up front. The valved design means one exhaust can be refined on the motorway and loud on a back road or track. Akrapovič notes that no ECU remap is needed for this setup. An optional Akrapovič Sound Kit is offered for this car to add more control over the exhaust sound. Akrapovič also offers optional link pipes for this car, intended for closed-course use. Akrapovič has versions and fitment notes for cars with and without a particulate filter, so check the engine and chassis in the table.

Materials and Construction

The titanium construction saves weight compared with the steel factory parts. Titanium also handles high exhaust temperatures and takes on its distinctive colouring with use. Some of the parts are cast in Akrapovič's own titanium foundry. The carbon-fibre parts are finished by hand.

Akrapovič designs and builds its exhausts in Slovenia. The company is known for its titanium work, its carbon-fibre parts and the sound tuning it does for each car.

Features

• Titanium construction
• Akrapovič dyno result: +4.6 hp at 2,650 rpm
• Akrapovič dyno result: +9.1 lb-ft at 2,650 rpm
• Weighs 29.6 lb (13.4 kg), 9.6 lb (24.6%) less than stock
• Valved for a quiet cruise and a louder sound under load
• Natural titanium finish
• Direct fit to the factory mounting points
• Developed on the Akrapovič dyno and in its sound lab

What Is Included

• Akrapovič BMW M440i (G22, G23) Slip-On Line (Titanium) (Requires BMW Part #18308686640) (S-BM/T/31H)

Specs

• Part number: S-BM/T/31H
• Brand: Akrapovič
• Material: titanium
• Finish: natural titanium
• Type: Slip-On Line exhaust
• Akrapovič product weight: 29.6 lb (13.4 kg)
• Weight saving vs. stock: 9.6 lb (4.4 kg), 24.6%
• Installation time: about 210 minutes
• Shipping dimensions: 57 x 40 x 14 in (145 x 102 x 36 cm)
• Shipping weight: 61 lb (27.7 kg)

Fitment Notes

• Fits the US-market vehicles listed in the table below.
• Professional installation is recommended.