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,"I've grouped the dual exhaust pipes on the right side of the transmission.". This made it possible to shorten the exhaust line, which reduced exhaust back pressure and served as the basis for the equal-length layout.
　
Equal-length layout
Focusing on the cross pipe, we’ll 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 adjust their length. This results in improved exhaust efficiency due to flatter exhaust pulsations and produces a high-quality exhaust sound with substantial sound pressure.

A Commitment to Low Friction
Without making the pipe diameter excessively large,A Commitment to Low FrictionAnd the higher the engine RPMs got, the more pronounced the effect became.
The front pipe has been shortened by using a shortcut.
The rear silencer features a layout that was redesigned starting with the F-series models to reduce 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 flexible tube, just like the stock system, but by adding it to the downpipe, it incorporates one flexible tube for each of the dual pipes, thereby improving vibration resistance.
　
Differential Heat Shielding
The exhaust pipe that runs under the differential/driveshaftHeat ShieldingWe are implementing [...].

Reuse of Original Equipment ActuatorsSince the exhaust flaps operate according to the DME control,
It will not be recorded in the defect memory.　
　
Exhaust Sound
With the exhaust flaps open, we've adjusted the sound level to be pleasant at high engine RPMs and during high-speed driving, so you can enjoy the ride even while wearing a helmet.
To achieve the highest possible sound quality and sound pressure, we used an equal-length layout and a rear silencer to control exhaust pulses and frequencies.
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 the previous model.

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 Pipe: Flexible

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

◆ Rear Silencer
　・Sports silencer design (low friction)
　・Reuses the OEM actuator (2-WAY)

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

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

ENGINE MODE: SPORT PLUS