HKSTUDIE EXHAUST for BMW G80/G82 Comp

HKSTUDIE-EX001

Compatible with both 2WD and 4WD. Compatibility of M3 Touring and M4 Cabriolet not confirmed.

Compatibility for vehicles with OPF not confirmed.

A specially designed tail tips paid homage to the legendary
"BMW 3.0 CSL“. It has a thick-walled slash-cut tail tips,
emphasizing the texture of the edges, and the surface is
blasted to express a dull glossy finish. Features a sound
deadening inner slits to create a one-of-a-kind tail tip design.
 The OEM exhaust of the G8X generation M produces a sporty
sound that is distinctive of the M series. Since replacing only
the main muffler does not produce a significant change in
sound, the HKSTUDIE exhaust features a layout that deletes
the middle muffler. The unique sound tuning based on
frequency analysis has achieved gentle yet powerful sound.
 Although it gives off a powerful sound, it still meets the strict
sound regulation of UN ECE-R51.03 Phase 2. This products
can be used safely for daily use and is compliant with
Japan's vehicle inspection regulations.
 Optimized pipe layout and a main muffler without restrictions
reduce exhaust pressure by up to 35% compared to the OEM
muffler. This results in increased boost responsiveness and
higher output at high RPM range and increases power output
by up to 5kw and torque by up to 15Nm.
 By manufacturing in-house at our factory in Japan and
conducting strict quality control, we are able to offer a 2-year
or 30,000 km product warranty from the time of purchase.

Certification Number JARI10240006P
Main Material SUS304
Tail Tips Outer Diameter 101.6mm (Quad Exit Style)
Main Pipe Diameter 70mm x2⇒60.5mm x2
Sound Level (OEM) 94dB (Idle: 63dB)
Sound Level (HKS) 97dB (Idle: 64dB)
Minimum Ground Clearance 135mm (#2 Mid Pipe)

35% reduction in exhaust resistance (max.)
By optimizing the layout, adopting a straight pipe without squeezing and
the internal structure of the main muffler without restrictions, exhaust
resistance is significantly reduced compared to the OEM exhaust as
shown in the graph above as a result of in-house testing.

Increases output +5kw and torque +15Nm
Lowering exhaust pressure leads to higher engine power output. As
shown in the graph on the right, the response of the turbo boost is
improved in the low rpm range, and torque is increased by up to 15Nm.
As for power output, the better exhaust flow leads to more power at
higher engine speeds, increasing the power by up to 5kw. All tests at our
headquarters were conducted using vehicles in stock condition except
for the exhaust system. The difference in power output between OEM
and HKSTUDIE exhaust systems will widen further when the ECU is
analyzed and tuned to increase power output.

NEW RELEASE INFORMATION

【Performance】
 Flow Bench Testing  Power/Torque Curve

 Sound Features
Exhaust sound tuning based on frequency analysis
Generally, low-frequency noise below 100 Hz are said to be unpleasant,
oppressive, and are described as a drone sounds in the cabin of a car.
HKSTUDIE produced various prototype exhausts and conducted sound
frequency analysis. General exhaust with internally constructed mufflers
will have a marked drone sound (see the lower right graph around 100
Hz), while the OEM exhaust successfully muffles the low-frequency
sound. This drone sound is especially noticeable when cruising at 80 to
100 km/h on highways. HKSTUDIE exhaust has newly designed the
inside of the muffler silencer to suppress the muffled sound and to
emphasize the mid-frequency sound above 200Hz, which is considered
to be a sporty sound. Thanks to its gentle sound during cruising, the
driver and passengers will not feel any discomfort, and once the driver
steps on the gas pedal, they will enjoy the powerful sound.
Exhaust Sound Level
In-house measurements of UN-ECE R51, a rough guide to the volume
of an exhaust system, are shown below. It is a comparison of three
different types of mufflers: a stock exhaust, a prototype of a general
muffler, and an HKSTUDIE exhaust.

Japanese Exhaust Noise Regulation
This product has been inspected and certified for UN-ECE R51.03.
The vehicles equipped with the exhaust certified by R51.03 is
applied the Japanese noise regulation of year 2016, and the noise
value indicated on the performance confirmation label shall be the
standard value, and the standard value + 5dB shall be the regulation
value. (In the case of this product, the noise value indicated on the
performance confirmation plate is 97 dB, so the Japanese exhaust
noise regulation limit value is 102 dB)
The measurement RPM for exhaust noise is taken at 3,750 rpm,
which is the RPM indicated in the remarks column of the vehicle
inspection certificate. The measurement point is as described in
R51-03. As shown to the right, the microphone should be placed at
a position 0.5 m away from and at a 45-degree angle to the furthest
outside exhaust tip from the longitudinal centerline of the vehicle.