181-00881 Exhaust System for G80/82-M3/M4

181-00881
LAPTORR Exhaust System G-M3/4

Applicable Models
BMW G80 M3 Sedan
BMW G81 M3 Touring
BMW G82 M4 Coupe
BMW G83 M4 Convertible
　
　
Features:
Front Pipe Short Cut
The stock front pipes are positioned on either side of the transmission, but with the LAPTORR exhaust system,"We've grouped the dual exhaust pipes on the right side of the transmission."This allowed us to shorten the exhaust line, which reduced exhaust backpressure and served as the basis for the equal-length layout.
　
Equidistant layout
Focusing on the cross pipe, we will cover the sections from the turbo to the cross pipe and from the cross pipe to the finisher, respectively"Equal-length layout" I decided to do that.From the turbo to the cross-pipe, the 4-5-6 pipes are arranged in a wave pattern to optimize length. This design results in improved exhaust efficiency due to reduced pulsation and produces a rich, high-quality exhaust note with substantial sound pressure.

A Commitment to Low Friction
Without making the pipe diameter excessively largeA Commitment to Low FrictionThe effect became more pronounced as the engine revs increased.
The front pipe has been shortened by cutting it.
The rear silencer features a redesigned layout compared to the F-series models, which has reduced friction.
　
Dual flexible tubes (when downpipes are installed)
The stock system consists of a single flexible tube. The LAPTORR exhaust system also features a single tube, just like the stock system, but by adding a downpipe, it incorporates two separate pipes—one for each side—which improves vibration resistance.
　
Differential heat shielding
The exhaust pipe that runs under the differential/driveshaftHeat shieldingWe are applying [...].

Use of OEM actuatorsSince the exhaust flaps operate according to the DME control,
It will not be recorded in the defect log.　
　
Exhaust sound
We have adjusted the exhaust note to be pleasant at high engine speeds and during high-speed driving with the exhaust flaps open, ensuring it remains enjoyable even while wearing a helmet.
To achieve the highest possible sound quality and sound pressure, we controlled exhaust pulsations and frequencies using an equal-length layout and a rear silencer.
When the exhaust flap is closed, the noise level is only slightly louder than the stock version.
We were able to reduce the vibration noise from the exhaust flap when it is closed compared to previous models.

Component Configuration
3-piece set: Front pipe + 2 middle pipes + Rear silencer
The product consists of the section from the rear of the downpipe to the finisher, excluding the downpipe itself.

◆ Front Cross Pipe
　・4-5-6 pipes: Flexible

◆ Middle Pipe
　・Set of two (left and right)
　・Sub-silencers (1 each)

◆ Rear silencer
　・Sports silencer design (low friction)
　・Reuses the stock actuator (2-way)

Material
　・Main pipe: SUS436 stainless steel
　・Silencer: Made of SUS304 stainless steel
　・Finisher: Titanium / 4 x 105 mm
　
Japanese Regulations
　・Not eligible for vehicle inspection (for competition use)

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Downpipes (sold separately)
・Catalytic converter-free / Straight-through type
・Not approved for vehicle inspection (for racing use)
Link to: LAPTORR DOWNPIPES for S58 Engine

ENGINE MODE: SPORT PLUS