181-00881 Exhaust system For G80/82-M3/M4

LAPTORR Exhaust System G-M3/4

Applicable model
BMW G80-M3 SEDAN
BMW G81-M3 TOURING
BMW G82-M4 COUPE
BMW G83-M4 CONVERTIBLE
　
　
Features
Front Pipe Short Cut
The stock front pipe is positioned on both sides of the transmission, but with the LAPTORR exhaust,The dual pipes have been consolidated on the right side of the transmission.This allowed for a shorter exhaust line, reducing exhaust resistance and forming the basis for the equal-length layout.
　
Fixed-width layout
Centered on the cross pipe, from the turbo to the cross pipe and from the cross pipe to the finisher respectively.Fixed-width layout I decided to do it.The turbo-to-cross-pipe section features a wave-out design for the 4-5-6 pipes with length adjustments. This achieves improved exhaust efficiency through flat exhaust pulsation and produces a high-quality exhaust sound with enhanced sound pressure.

Thorough Low Friction
Without excessively increasing the pipe diameterThorough Low FrictionThe effect increased as the engine reached higher RPMs.
The shortened front pipe allows for a reduced overall pipe length.
The rear silencer layout was changed from the F-series models to reduce friction.
　
Dual Flexible Tube (When Downpipe is Installed)
The stock system uses a single flexible tube. The LAPTORR exhaust system also uses a single tube like the stock system, but by adding it to the downpipe, it effectively enhances vibration resistance by installing one tube per dual pipe.
　
Differential Heat Shielding
Exhaust pipe passing under the differential/drive shaftheat shieldingis being applied.

Reuse of genuine actuatorThe exhaust flap will operate according to the DME control.
It will not be recorded in the defect memory.　
　
Exhaust Sound
The volume is set to a pleasant level with the exhaust flap open during high engine RPM and high-speed driving, allowing for enjoyable listening even while wearing a helmet.
Sound quality was optimized for maximum high-fidelity and high-pressure output through equal-length layout and rear silencer design, which controlled exhaust pulses and frequencies.
When the exhaust flap is closed, the volume is only slightly louder than the stock system.
We have been able to reduce the flap vibration noise when the exhaust flap is closed compared to the previous model.

Component Configuration
3-piece: Front pipe + Middle pipe x2 + 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-silencer (1 each)

◆ Rear Silencer
　・Sports silencer structure (low friction)
　・Reuse of genuine actuator (2-WAYS)

material properties
　Main pipe: SUS436 stainless steel
　Silencer: SUS304 stainless steel
　・Finisher: Titanium / Φ105mm x 4 pieces
　
Japanese Regulations
　・Not road legal (for competition use only)

Downpipe (sold separately)
・Catalyst-less / Straight Type
・Not compliant with vehicle inspection (for competition use)
Link to: LAPTORR DOWNPIPES for S58 Engine

ENGINE MODE: SPORT PLUS