Wax Racing Billet Head kit

Upgrade your jet ski with a high-performance billet head from Wax Racing—designed for durability, performance, and ease of use by riders who wrench on their own skis.

Available as a Complete Kit or Individual Parts

Whether you're doing a full top-end build or just replacing a component, the Wax Racing head system is available both as a complete kit or individually as separate parts. Choose what suits your build:

• Purchase the head, domes, and girdle kit together as a full setup

• Or grab only the components you need—each part is listed separately for maximum flexibility

Product Features

• CNC-machined from 6061-T6 aluminum for strength and consistency

• Anodized finish for superior corrosion resistance in saltwater environments

• Includes brass water fittings and O-rings for all sealing grooves

• Compatible with ADA-style domes

• Comes with twice the number of O-rings needed—because we know how easy it is to drop one during assembly (Yes, we work on our own skis too.)

Current Dome Availability

• Wax Racing currently offers 35cc domes for 701 applications

• New toroidal-shaped domes are in development to optimize performance on unleaded fuel

Girdle Kit Compatibility

• Girdle kit fits both 701 and 760 cylinders

• Note: 760 cylinders will require machining to clear all girdle studs

Spark Plug Info

• Uses standard-reach NGK ES spark plugs

  • BR8ES or BR9ES depending on your compression and timing setup

  • Use BR9ES for higher compression or more aggressive ignition timing

What’s Included (with head only)

• 1x Wax Racing billet head

• Brass water fittings

• 2x sets of O-rings

To Complete Your Setup

Be sure to add:

• 2x domes (sold individually)

• 1x girdle kit (sold separately)

Ready to Build Your Setup?

Add the parts you need to your cart, or grab the full Wax Racing head kit to take your ski to the next level.