Power Pak's just the beginning - scroll on to uncover the how, the why, and everything you need to know to make game-changing decisions!

S55 Power Paks

Disassembly and Inspection

We take the disassembly and inspection process very seriously to ensure the highest quality. Each cylinder head undergoes an initial inspection during disassembly, followed by a second inspection by a separate technician to catch any potential issues right from the start.

Even if you provide new cores or disassembled heads, they will still need to be inspected for damage, unless purchased directly from HeadGames. Inspection fees apply to all cylinder heads.

  • For assembled heads, a $310 service charge covers disassembly, inspection, oil plug removal, and flushing in our Ultrasonic, and Wet Blaster. 
  • For disassembled and new cores, a $120 inspection fee applies. Remember, new heads can have issues too!

Cleaning

We’ve put in the effort to deliver the highest standard of surface finish and cleanliness in cylinder head cleaning.

For a factory-fresh look, we offer vapor honing to restore your heads to a like-new appearance.

All heads are thoroughly cleaned using our Wet Technologies wet soda blaster, ultrasonic cleaner, or spray washer to ensure optimal results.

Oversized Valve Flow vs. OEM Valve

We often get asked why we don’t offer oversized valves for the BMW S55 cylinder head. The answer is simple: oversized valves do not fit on the OEM valve seats.

The reality is the factory port design doesn’t support a larger valve and the oversized valve physically doesn’t fit the seat properly. You’re left with a valve that’s bigger than the seat it’s trying to seal, which compromises durability, sealing, and reliability.

At HeadGames Motorworks, we focus on what works—not what looks good on paper. Proper valve sizing keeps flow optimized, seats intact, and power where it belongs: under your right foot!