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

181-00881
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 LAID OUT ON BOTH SIDES OF THE TRANSMISSION, BUT WITH THE LAPTORR EXHAUST"Dual pipes are grouped together on the right side of the transmission."The exhaust line was shortened to reduce exhaust resistance and to form the basis for an equal-length layout. This shortened the exhaust line, thereby reducing exhaust resistance and providing the basis for an equal-length layout.
　
isometric layout
centered on the crosspipe, from the turbo to the crosspipe and from the crosspipe to the finisher, respectively."Isometric layout" The first time I did this, I was very surprised.The turbo to cross pipe has a 4-5-6 pipe with wave layout and length. This results in a high quality exhaust sound with high exhaust efficiency and sound pressure due to the flat exhaust pulsation.

Ensure low friction
Without excessively increasing pipe diameter.Ensure low frictionThe higher the engine revs, the greater the effect at the higher RPM range.
A shortcut in the front pipe shortens the pipe length.
THE REAR SILENCER LAYOUT WAS CHANGED FROM THE F-SERIES MODEL TO REDUCE FRICTION.
　
Dual flexible tube (when downpipe is installed)
THE STOCK EXHAUST SYSTEM HAS ONE FLEXIBLE TUBE; THE LAPTORR EXHAUST SYSTEM HAS ONE, JUST LIKE THE STOCK SYSTEM, BUT WITH THE ADDITION OF A DOWNPIPE, ONE FOR EACH OF THE DUAL PIPES TO INCREASE THE VIBRATION RESISTANCE.
　
Differential heat shielding
of the exhaust pipe that passes under the differential/driveshaft.heat shieldingThe following is a list of the products that have been applied to the product.

Use of stock actuatorTHE EXHAUST FLAP OPERATES AS PER THE DME CONTROL IN THE
It is never recorded in the defective memory.　
　
exhaust sound
The volume is set to be pleasant at high engine speeds and high speeds with the exhaust flap open, so that it can be enjoyed even when wearing a helmet.
Sound quality was controlled for exhaust pulse and frequency by means of equal-length layouts and rear silencers to achieve the highest possible sound quality and sound pressure.
When the exhaust flap is closed, it is only slightly louder than stock.
The flap vibration noise when the exhaust flap is closed has been suppressed compared to the conventional product.

Component Composition
3-part: Front Pipe + 2 Middle Pipes + Rear Silencer
The product is from the rear of the downpipe to the finisher, excluding the downpipe.

Front cross pipe
　4-5-6 pipe: Flexible

Middle pipe
　Set of 2 pcs.
　Sub silencer (1 each)

Rear silencer
　Sports silencer construction (low friction)
　STOCK ACTUATOR (2-WAYS)

material properties
　MAIN PIPE: SUS436 STAINLESS STEEL
　SILENCER: SUS304 STAINLESS STEEL
　Finisher: Titanium / Φ105mm x 4
　
Japan Regulations
　Not for vehicle inspection (for competition use)

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Downpipes (sold separately)
- Catalyst-less/straight type
- Not for inspection (for competition use)
Link to : LAPTORR DOWNPIPES for S58 Engine

ENGINE MODE: SPORT PLUS