Yella Terra L67 High-Boost Snout Kit 74/71mm

Yella Terra Holden L67 high boost billet supercharger snout upgrade kit

Yella Terra Holden L67 High-Boost Billet Snout Upgrade Kit — 74mm / 71mm

$1,150.00

This is Yella Terra’s high-boost billet-snout package for the Holden / Buick 3800 L67/L32 supercharged V6. It replaces the factory front cover with the supplier’s quick-change billet snout and uses 74 mm or 71 mm pulleys to increase blower speed for more aggressive combinations.

High-boost 74 mm / 71 mm package

Selectable 74 mm and 71 mm blower-pulley sizes.
Yella Terra strongly recommends these drive ratios only with an intercooled setup.
A custom ECU tune is required.
On Yella Terra’s stock-standard L67 automatic test combination, the supplier reports up to approximately 40% more maximum rear-wheel power and up to approximately 60% more torque. Results depend on the complete vehicle and engine setup.
Four-cap-screw pulley retention enables fast pulley changes without specialised press tools.

Kit contents

Supercharger end case.
Alloy extension housing.
Anodised alloy top pulley.
Oversize idler pulley.
GM supercharger gasket.
Front-cover sealant.
Supercharger oil.
Detailed fitting instructions.

Important: These are high-boost pulley ratios. Intercooling, suitable fuel delivery and a custom tune are essential. Higher blower speed can increase supercharger wear.