ProMaxx Replacement Cylinder Head 2004-2014 Subaru WRX STI It's not good engineering and

It's not good engineering and it's not the way we do things at Banks

and off-road use

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ProMaxx Replacement Cylinder Head 2004-2014 Subaru WRX STI It's not good engineering andProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Features: New Casting Improved Casting In "Problem Areas" No Core Charge!