CAMSHAFT OEM NO.: WE-01-12-420(IN) & WE-01-12-440(EX)

The CAMSHAFT SET (WE-01-12-420 & WE-01-12-440) is engineered for Mazda BL20 engines (2.0L DOHC), delivering OEM+ performance for models like Mazda6, CX-5, and turbocharged builds. Manufactured with JIS-SCM435H steel and CNC profile grinding, this set increases valve lift by 12% while maintaining ISO 9001/JIS D2001 durability standards. Trusted by tuners and repair shops worldwide, we offer direct-fit replacements, custom turbo profiles, and 72-hour global logistics.

High-performance camshaft set (IN:WE-01-12-420 & EX:WE-01-12-440) for MAZDA BL20 engines. ISO/JIS-certified for OEM+ power gains. Turbo-ready designs, global shipping & tuner support.

CAMSHAFT OEM NO.: WE-01-12-420(IN) & WE-01-12-440(EX)

Core product highlights
Performance classification:
✅ Street Version: Original replacement, improve low torque by 8%
✅ Track Version: High-angle design, support 1.5Bar boost value

Material technology:

Silicon nitride ceramic coating (friction reduction of 15%)

Carburized hardened layer depth of 1.2mm (life increased by 30%)

Applicable scenarios:

Original repair / Stage 1-3 power upgrade / track day car

Applicable models and technical parameters
Model Production year Engine code Key market
Mazda6 (GJ) 2012-2018 BL20 (PE-VPS) North America, Australia
Mazda CX-5 (KF) 2017-2023 BL20 (PY-VPTS) Europe, Middle East
Turbo modification program Custom Builds BL20-T (modified version) Japan, Southeast Asia modification market
Technical parameters IN: WE-01-12-420 EX: WE-01-12-440
Material JIS-SCM435H chrome-molybdenum steel JIS-SCM435H + TiAlN coating
Cam lift 10.2mm (+12% vs OEM) 9.8mm (+10% vs OEM)
Applicable speed range 800-7,200 RPM 800-7,500 RPM
Warranty terms 24 months/unlimited mileage (track version) 36 months/100,000 kilometers (street version)
Installation and adjustment guide
Tools required:

Mazda M-MDS diagnostic instrument (reset VVT learning value)

Torque wrench (20-120Nm, accuracy ±1%)

Key steps:

Record the original VVT phaser angle before disassembly (to avoid timing misalignment)

Tighten the bearing cap in 3 times in a cross sequence (30Nm→45Nm→60Nm)

Use ARP camshaft installation lubricant (P/N 100-9905)

ECU tuning suggestions:

Street version: air-fuel ratio correction ±5%, ignition advance angle +3°

Track version: requires high-pressure fuel pump and ECU remap

Global customer solutions
Fast delivery:

North America/Europe: 3-day delivery (UPS/FedEx priority)

Asia: 1-day delivery (direct delivery from Japan/Singapore warehouse)

Technical support:

Provide MazdaEdit tuning files (Base Map)

Online engineer support (Zoom/TeamViewer remote diagnosis)

FAQ (solving modification pain points)

Q: Is the track version compatible with the original VVT system?

A: Fully compatible, but it is recommended to upgrade the High-RPM VVT controller (optional).

Q: Is high-ethanol gasoline (E85) applicable?

A: The track version comes standard with ethanol fuel coating (no additional cost).

Q: Can you provide material certification?

A: Each set comes with a JIS material report and 3D contour detection data.

Mail consultation

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