Built to order — every unit is specified in consultation with us.
No two builds are the same. Tell us about your project using the Request a Quote form above — or message us on WhatsApp +61 417 238 033 or sales@billetrotary.com.au — and we'll come back to you with a formal quotation for your exact specification.
Indicative pricing from $49,999 AUD. Final pricing depends on specification, selected options and current component costs.
High-value assemblies are invoiced directly and paid by bank transfer — we don't take five-figure payments through online checkout. Your quote will include payment details, build lead time and worldwide freight options.
Fully assembled 13B long block, precision-built in-house using premium-grade components and tailored to suit your application — whether it’s drift, drag, circuit or high-end street. No two builds are the same.
All engines are custom-quoted depending on your goals, fuel system, ECU choice and supporting components. The price listed is a base starting point only and not to be take literally.
Base long block includes:
Genuine Mazda rotor housings, rotors and stationary gears
Front, intermediate and rear end plates
Fully balanced rotating assembly
Apex, side and corner seals with complete seal kit
Engine dowels and thou bolts or stud kit
Front timing cover
Setup for wet or dry sump systems
Available upgrades & options:
Centre bearing eccentric shaft (billet or modified OEM)
Isotropic polishing
Steel or Ceramic apex seals
Competition bearings
Rotor clearancing, lighting, apex seal groove modifications
Street-port, bridge-port, semi-peripheral or full PP
Direct injection
Spark plug relief modifications
Cooling system modifications
Custom painting, powder coating, polishing of engine components
Bolt-on components:
Intake manifold systems
Dry sump oiling system
Multi-rib pulley kits and high-output alternators
Custom clutch and flywheel setups
Bolt accessories
ECU & fuel system options:
Motec, FuelTech, Haltech, MicroTech
High-performance injectors, fuel rails and regulators
Sensor packages, crank triggers and looms
In-tank or external pump kits
Quoting & Ordering:
