A compact catalog of manufacturer references, expected outcomes and
notes that help prevent incorrect combinations.
Reference policy
OEM and manufacturer part numbers are retained exactly as supplied. Cross-platform parts and adapted components require independent confirmation of electrical, mechanical and calibration compatibility.
Local garage
Load a saved vehicle.
Reuse a configuration saved in the Build Checker to preselect its model, year range and engine here.
Part-number references intended to improve fuel delivery, thermal
control and ignition reliability when paired with the correct
calibration.
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03
Third generation
CS Turbo or VT Supercharger
NGK spark plugs
DILKAR8A8
NA CX-50 thermostat
PX8E-15-171
CX-9 fuel-pump module
PYFL-18561
Fab9 MCAL pump (CX-9)
PYFL-13350
Justin recommends these supporting parts for longevity and power,
provided the calibration matches the complete setup.
04
Fourth generation
VT Supercharger
NGK spark plugs
DILKAR8A8
EcoBoost injectors
CM-5279 or EJ7Z-9F593-C
LC500 / GR Corolla low-pressure fuel pump
23221-31130 or 291200-1001
CX-90 fuel-pump control module
PXFV-18-561
Supporting fuel-system hardware for boosted E85 preparation and
builds targeting more than 350 whp. Final capacity depends on the
complete setup and calibration.
Supercharger reference
Belt, pulley and air-filter notes
Practical hardware observations for transverse 2012-2022
Skyactiv-G 2.0L and 2.5L supercharger kits without M-Hybrid.
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05
Heavy-duty belt options
2.5L supercharger kit
1535 mm belt
K100604HD
Compatibility
63 mm compressor pulley
Modification
Cut four ribs
1520 mm belt
K060598HD
Compatibility
Both pulley sizes; no rib cutting required
A shorter, stiffer belt can reduce stretch and slipping when the
load increases during an upshift.
06
Heavy-duty belt option
2.0L supercharger kit
1485 mm belt
K080585HD
Compatibility
Proven with both pulley sizes
Modification
Cut two ribs
Kit fitment
2012-2022 transverse Skyactiv-G 2.0L
Verify belt alignment, rib engagement, tensioner position and
clearance before starting the engine.
Use these belt references at your own risk
Cutting belt ribs is a custom adaptation. An incorrect width,
alignment or tension can damage the belt, pulleys or nearby
components. Inspect the installation frequently and replace any
belt showing fraying, glazing, cracking or tracking problems.
Smaller compressor pulley
Plan the installation before fitting the kit
01Best approach
Install the smaller pulley before installing the supercharger.
02Fourth generation
Fourth-generation 2.0L and 2.5L Mazda3 and CX-30 models provide enough access to change it with the supercharger installed.
03Other 2.5L models
The ABS unit restricts access, except on the CX-50. An on-car replacement is possible but difficult and increases the risk of stripping the bolts.
04Other 2.0L models
These generally provide more clearance between the supercharger and ABS unit.
Fourth-generation drop-in filters
Air-filter comparison
Pipercross
Foam; Justin considers it the lowest-quality option
BMC
Oiled; the hardest option to find
K&N
Oiled; easier to source and produces a higher-pitched whine
Wix
Paper; Justin's preferred option for filtration
AutoExe
High-flow disposable filter
aFe
Available as oiled and dry-flow drop-in filters
Compared with the paper filter, the K&N makes the supercharger
whine clearer and higher pitched. Confirm the exact airbox and
model-year reference before ordering.
Compatibility before modification
Parts Justin recommends avoiding
Some popular modifications can interfere with the calibration,
reduce drivability or add mechanical risk instead of improving the
complete setup.
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Not tune compatible
Throttle boosters
Do not use any external throttle booster with Justin's tune. These
devices alter the pedal signal outside the calibrated strategy and
have previously caused electrical faults. Justin also reports
worse fuel economy with them.
Crankshaft drive
Lightweight pulley sets
Justin prefers the stock crank pulley in almost every case. His
observed lightweight setups lose rotational momentum between
shifts and are more likely to throw a belt at high engine speed.
Use a properly engineered damper only after confirming exact
compatibility.
Exhaust sizing
80 mm is for turbo builds
Justin recommends an 80 mm exhaust only where a turbocharged
combination needs the additional flow. On naturally aspirated and
supercharged Skyactiv-G builds, excessive diameter can reduce
cylinder filling and usable power when it is not matched to the
valve-timing strategy.
Choose as a system
Intake, exhaust, pulley and pedal-signal changes must be declared
before calibration. Do not assume that a lighter, larger or more
aggressive part will improve performance on every engine.
Cooling-system compatibility
CX-50 thermostat fitment guide
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Compatible
2012-2018 Mazda3
Compatible with the naturally aspirated 2.0L and 2.5L engines.
Compatible
Selected NA models
2014-2017 Mazda6, 2013-2017 CX-5 and 2016-2018 CX-3.
Compatible
ND1 and ND2 MX-5
Compatible with the supported 1.5L and 2.0L Skyactiv-G engines.
Compatible
All supported 2.5L Turbo models
Compatible 2.5L Turbo applications from 2016 through 2024.
Always reconfirm current manufacturer fitment for your VIN, market and
specification before purchase.