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 $18,999 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.

Billet 13B Block "PRO STREET " Core Block

Please note: The listed price is a basic guide only and will require an individual quote based on your specific needs.

Whats included:

Billet Pro 6000 Series Front Plate
Billet Pro 6000 Series Intermediate Plate
Billet Pro 6000 Series Rear Plate
Mazda Rotor Housing's (x2)
Front Stationary gear (Comes with factory fitted bearing)
Rear Stationary gear (Comes with factory fitted bearing)
1/2UNC 4340 Hex head Stud kit with ARP Nuts and washers
Dowels
Billet Insert removal and fitment tools
All Billet end plates and rotor housings are Precision machine bored to low tolerance to insure correct and proper fitment to suit 1/2 Stud kit.
Anodised colour options available on request

These high quality units feature:

Cosmo pattern intake ports
Super Strong 6061 billet aircraft grade aluminum
Can be used for either street or racing use. (For high horse power applications above 1300hp we recommend using the 7000 series core block)
Water cooling flowpath design to exceed OEM flow rates.
OEM spec external design. (All of you accessories will bolt straight on)
Replaceable precision ground cast iron wear face (Inserts) with advanced screw type retainer design
Intermediate Plate can be used with any an eccentric shaft option (Widgets for centre bearing sold separately)

NOTES:

Custom options

13B Billet Engine PRO STREET Core Block

$18,999.99

PORT

Quantity

All prices displayed on this website are subject to change without notice.

While Billet Rotary Pty Ltd makes every effort to ensure that product descriptions, specifications, images, and pricing are accurate and up to date, errors may occasionally occur due to typographical, technical, photographic, or supplier pricing changes.

Submitting an order and receiving an order confirmation email does not constitute acceptance of your order. All orders are subject to review and acceptance by Billet Rotary Pty Ltd. An order is deemed accepted only when it has been processed and dispatched.

If we discover that a product has been listed with an incorrect price before an order has been accepted, we reserve the right to cancel or decline the order. If this occurs, we will notify you as soon as possible and provide you with the option to purchase the product at the correct price or receive a full refund of any payment made.

If the correct price is lower than the price displayed at the time of your order, we will charge the lower amount where possible or refund the difference if payment has already been processed.

Nothing in this policy excludes or limits your rights under the Australian Consumer Law.

13B Billet Engine PRO STREET Core Block

Pricing Errors, Price Changes & Order Acceptance

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