Yella Terra Holden 6 Road Racer 12-Port Alloy Cylinder Head — 68cc Bare — ACH 33C68
$2,450.00
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Yella Terra Holden 6 Road Racer 12-Port Alloy Cylinder Head — 68cc Bare — ACH 33C68
$2,450.00
Yella Terra’s ACH 33C68 Road Racer is a semi-finished high-compression 68 cc alloy 12-port head developed for Holden inline-six performance builds. The supplier lists it for Blue/Black 202 applications and notes it can be adapted to earlier Red 149–202 engines with the required block modifications.
Road Racer specification
- 68 cc combustion chambers.
- Approximately 82 cc intake-runner volume.
- Approximately 71 cc exhaust-runner volume.
- 356-T6 aluminium construction.
- Rough-cut valve seats for final engine-builder machining.
- 7/16-inch screw-in rocker-stud provision.
Fitment: Designed around Holden 202 Blue/Black 12-port architecture; earlier Red motor installations require confirmation of the block modifications, manifold and valvetrain combination.
Product System
- Engine Parts
Supplier Part Number
ACH 33C68
Built by Boost & Tune Support
BBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.