VW enthusiasts, this EMPI GTV-2 cylinder head is some serious upgrade material for your air-cooled engine. It's designed for 90.5mm or 92mm pistons and comes completely ready to run with 40mm intake and 35.5mm exhaust valves made from stainless steel. The casting itself is way better than stock - they've used a special aluminum alloy that's stronger but still repairable if needed. The intake and exhaust ports are already 20% larger than stock, and there's extra material around them so you can do some serious porting without needing to weld anything. It's got a 56cc combustion chamber and is machined for 12mm 3/4 reach spark plugs. They include all the studs you need for rocker arms and intake/exhaust mounting. The single hi-rev valve springs with chromoly retainers and hardened keepers are perfect for performance builds. Whether you're building a dune buggy, baja bug, or just want more power from your VW, this head gives you a great foundation. You can run it as-is for a solid performance boost or really go wild with porting since there's so much material to work with. EMPI has been making VW performance parts forever, so you know this is quality stuff that'll hold up to some abuse.