Yella Terra Holden 6 Road Racer 12-Port Alloy Cylinder Head — 48cc Assembled — ACHA 33C48
$3,550.00
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Yella Terra Holden 6 Road Racer 12-Port Alloy Cylinder Head — 48cc Assembled — ACHA 33C48
$3,550.00
ACHA 33C48 is the assembled high-compression Road Racer version of Yella Terra’s alloy Holden inline-six 12-port head. Its 48 cc closed chamber is aimed at naturally aspirated performance combinations where the engine builder is deliberately targeting increased compression.
Road Racer assembled head
- 48 cc closed combustion chambers.
- Assembled valvetrain configuration.
- 356-T6 alloy 12-port architecture.
- Designed around Holden Blue/Black 202 applications.
- Can be adapted to earlier Red 149–202 engines with the required block changes.
Compression check: This is a high-compression chamber. Calculate static and dynamic compression and verify piston-to-valve/chamber clearance before assembly.
Supplier
Yella Terra
Product System
- Engine Parts
Supplier Part Number
ACHA 33C48
Built by Boost & Tune Support
BBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.